CN110759097B - Feeding system for fly ash washing - Google Patents
Feeding system for fly ash washing Download PDFInfo
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- CN110759097B CN110759097B CN201911115432.6A CN201911115432A CN110759097B CN 110759097 B CN110759097 B CN 110759097B CN 201911115432 A CN201911115432 A CN 201911115432A CN 110759097 B CN110759097 B CN 110759097B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/16—Gas pressure systems operating with fluidisation of the materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/36—Arrangements of containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/48—Screws or like rotary conveyors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/52—Adaptations of pipes or tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a feeding system for fly ash washing, comprising: a fly ash storage unit; the fly ash conveying unit is connected with the fly ash storage unit; the compressed air unit is respectively connected with the fly ash storage unit and the fly ash conveying unit; the pressure release unit is connected with the fly ash conveying unit; a backflow unit connected with the pressure release unit. The device has the advantages that the compressed air unit, the pressure release unit and the backflow unit are introduced, the feeding system is ensured to continuously work for 1 month without manual cleaning or intervention, the actual conveying capacity is almost consistent with the designed conveying capacity, and the stable work of the whole fly ash washing system and the accuracy of material balance are ensured; the process has high equipment integration level and high automation degree, and can modify set parameters through different working conditions to achieve the most stable running state.
Description
Technical Field
The invention relates to the technical field of feeding systems, in particular to a feeding system for fly ash washing.
Background
The waste incineration fly ash is the collected matter of a flue gas purification system and bottom ash settled at the bottom of a flue and a chimney in the municipal domestic waste incineration disposal process. The waste incineration fly ash contains pollutants such as heavy metals, benzene series, dioxin and the like, and is listed as hazardous waste (HW18) in China.
The cement kiln co-disposes the waste incineration fly ashThe pretreated fly ash is used as a raw material and added into the cement production process, so that part of cement raw materials are replaced, organic pollutants such as dioxin enriched in the fly ash are effectively removed, and the resource treatment of the fly ash is realized. Because fly ash contains a large amount of Cl-And heavy metal elements, which must be pretreated in order to avoid affecting the cement production process. A great deal of research shows that the method adopting water washing pretreatment can effectively remove Cl in fly ash-Avoid being caused by Cl-Too high causes system balling and material blockage, etc.
The fly ash of the waste incineration is conveyed from the fly ash storage bin to the premixing tank as the first step of the whole fly ash washing process, but the fly ash has the characteristics of high viscosity, moisture and hardening, and the condition that the fly ash is wetted and hardened to cause the blockage of a conveying device can often occur by applying a traditional fly ash conveying system.
For example, patent CN205443075U provides a fly ash washing, feeding and stirring system, which is used in fly ash washing process, and describes a feeding manner mainly based on electric hoist lifting and screw conveying, but the invention is basically almost the same as the traditional mechanical conveying, and the fly ash still blocks the screw conveying device; patent CN203833018U proposes an anti-blocking soot blower for an ash storage device, which is mainly used for the situation that fly ash in the ash storage device is affected with damp and hardened and further can not be discharged normally, and a soot blower is added at the position of an ash bucket of the ash storage device, but blowing air used by the invention is not subjected to processes of dewatering, heating and the like, so that the fly ash in the ash storage device is more easily affected with damp and hardened; the patent CN109368901A discloses a system and a method for washing treatment of fly ash from waste incineration, which describes a system and a method for washing treatment of fly ash from waste incineration, including pretreatment of fly ash washing, treatment of waste water after washing, treatment of waste water by evaporation and salt separation, but does not describe the fly ash feeding process in detail.
Taking the above patent as an example, the problems of the solution mainly include: firstly, as the ash storage device is not provided with matched equipment, fly ash can be affected with damp and hardened in the ash storage device; secondly, as the conveying equipment has no related anti-blocking equipment, the fly ash can be blocked or agglomerated in the conveying equipment; due to lack of relevant anti-blocking measures, a discharge port of the conveying equipment can contact water vapor of the premixing tank, and the discharge port is blocked; due to lack of relevant measures, a vacuum release valve of the premixing device can be blocked by the fly ash; due to lack of relevant exhaust measures, the pressure in the premixing device rises, and the normal work of subsequent washing equipment is influenced.
Therefore, a set of feeding system for washing fly ash is needed, which can automatically control the feeding amount of fly ash without manual intervention on the fly ash feeding system, so that the fly ash washing system can normally, automatically and continuously operate.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a feeding system for washing fly ash.
In order to achieve the purpose, the invention adopts the technical scheme that:
a feed system for fly ash water scrubbing, comprising:
a fly ash storage unit;
the fly ash conveying unit is connected with the fly ash storage unit;
the compressed air unit is respectively connected with the fly ash storage unit and the fly ash conveying unit;
the pressure release unit is connected with the fly ash conveying unit;
a backflow unit connected with the pressure release unit.
Preferably, the fly ash storage unit comprises:
the ash storage device is connected with the fly ash conveying unit;
and the heating device is respectively connected with the fluidized air system and the compressed air unit.
Preferably, the heating device is an in-line heater.
Preferably, the fly ash storage unit further comprises:
the fluidizing air system is connected with the ash storage device;
the rapping device is connected with the ash storage device;
and the dust removal device is connected with the ash storage device.
Preferably, the fluidization air system is arranged in the middle of the ash storage device.
Preferably, the rapping device is arranged at the middle lower part of the ash storage device.
Preferably, the dust removing device is arranged at the upper part of the ash storage device.
Preferably, said rapping device is a rapping motor.
Preferably, the dust removal device is a bin top dust remover.
Preferably, the fly ash conveying unit comprises:
and the spiral conveying device is connected with the fly ash storage unit.
Preferably, the fly ash conveying unit further comprises:
the air purging device is respectively arranged at the inlet, the outlet and the middle part of the spiral conveying device;
and the pneumatic control device is arranged at the outlet of the spiral conveying device.
Preferably, the screw conveyor is a screw conveyor.
Preferably, the pneumatic control device is a pneumatic butterfly valve.
Preferably, the compressed air unit includes:
an air compression device;
the first filtering device is connected with the air compressing device;
the freeze drying device is connected with the first filtering device;
the gas storage device is connected with the freeze drying device;
and the second filtering device is respectively connected with the gas storage device, the fly ash storage unit and the fly ash conveying unit.
Preferably, the air compression device is an air compressor.
Preferably, the first filter device is a filter.
Preferably, the freeze drying device is a freeze dryer.
Preferably, the gas storage device is a gas storage tank.
Preferably, the second filter device is a filter.
Preferably, the pressure release unit includes:
the premixing device is respectively connected with the fly ash conveying unit and the backflow unit;
a vacuum release device connected with the premixing device.
Preferably, the vacuum releasing means is provided at an upper portion of the premixing device.
Preferably, the premixing device is a premixing tank.
Preferably, the reflow unit includes:
a water collection device connected with the pressure release unit;
and the backflow control device is respectively connected with the water collecting device and the pressure release unit.
Preferably, the water collecting device is a water collecting tank.
Preferably, the backflow control device is a backflow pump.
Preferably, the reflow unit further includes:
the liquid level metering device is connected with the water collecting device;
and the water supplementing control device is connected with the water collecting device.
Preferably, the liquid level metering device is a liquid level meter.
Preferably, the water replenishing control device is a water replenishing valve.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects: in the fly ash washing feeding system, a compressed air unit is introduced for the first time, so that the fly ash in the ash storage device and the spiral conveying device is prevented from hardening, the fly ash conveying unit is operated more smoothly, and the conveying capacity is more accurate; a pressure release unit is introduced for the first time, so that ash is prevented from being blown out of the premixing device due to overlarge pressure, and the working environment is improved; the backflow unit is introduced for the first time, so that the influence of ash overflowing from the premixing device on the feeding amount of the system is prevented, and the material balance of the whole system is more accurate; the operation of the fly ash washing feeding system is greatly improved, the feeding system can be ensured to continuously work for 1 month without manual cleaning or intervention, the actual conveying capacity is almost consistent with the designed conveying capacity, and the stable work of the whole fly ash washing system and the accuracy of material balance are ensured; the process has high equipment integration level and high automation degree, and can modify set parameters through different working conditions to achieve the most stable running state.
Drawings
FIG. 1 is a process flow diagram of a fly ash water wash system according to an embodiment of the present invention.
Wherein the reference numerals are: a fly ash storage unit 100; an ash storage device 101; a fluidized wind system 102; a heating device 103; a rapping device 104; a dust removing device 105;
a fly ash conveying unit 200; a screw conveyor 201; an air purge device 202; a pneumatic control device 203;
a compressed air unit 300; an air compression device 301; a first filter device 302; a freeze-drying device 303; a gas storage device 304; a second filtering device 305;
a pressure relief unit 400; a premixing device 401; a vacuum release device 402;
a reflow unit 500; a water collecting device 501; a reflux control device 502; a liquid level gauge 503; and a water replenishment control device 504.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1, a feeding system for washing fly ash comprises a fly ash storage unit 100, a fly ash conveying unit 200, a compressed air unit 300, a pressure release unit 400 and a backflow unit 500, wherein the fly ash storage unit 100 is respectively connected with the fly ash conveying unit 200 and the compressed air unit 300, the fly ash conveying unit 200 is respectively connected with the compressed air unit 300 and the pressure release unit 400, and the pressure release unit 400 is connected with the backflow unit 500.
The fly ash storage unit 100 comprises an ash storage device 101, a fluidizing air system 102, a heating device 103, a rapping device 104 and a dust removal device 105, wherein the ash storage device 101 is respectively connected with the fluidizing air system 102, the rapping device 104 and the dust removal device 105, and the fluidizing air system 102 is connected with the heating device 103.
Further, the fluidizing air system 102 is disposed in the middle of the ash storage device 101, and is used for making the fly ash in the ash storage device 101 in a fluidized state to prevent the fly ash from being hardened by moisture.
Further, the rapping device 104 is disposed at the middle lower portion of the ash storage device 101 for preventing the fly ash in the ash storage device 101 from being stocked and hardened.
Further, a dust removing device 105 is provided at an upper portion of the ash storage device 101 for preventing the fly ash in a fluidized state in the ash storage device 101 from drifting out of the ash storage device 101.
Further, the rapping device 104 is a rapping motor.
Further, the dust removing device 105 is a silo top dust remover.
Further, the heating device 103 is a pipeline heater, and is configured to heat the gas entering the fluidized air system 102, so that the gas conveyed by the fluidized air system 102 to the ash storage device 101 has a certain temperature, thereby reducing the humidity in the ash storage device 101 and preventing the fly ash in the ash storage device 101 from being damp and hardened.
The fly ash conveying unit 200 comprises a screw conveyer 201, and the screw conveyer 201 is connected with the ash storage device 101 and is used for receiving the fly ash conveyed by the ash storage device 101.
Further, the screw conveyor 201 comprises an air purge device 202 and a pneumatic control device 203, the air purge device 202 is respectively arranged at the inlet, the outlet and the middle of the screw conveyor 201 for preventing the fly ash with viscosity from being blocked at the screw conveyor 201; the pneumatic control device 203 is arranged at the outlet of the spiral conveying device 201 and is used for preventing outlet blockage caused by contact of external water vapor and fly ash at the outlet of the spiral conveying device 201 when the spiral conveying device 201 stops working.
Further, the screw conveyor 201 is a screw conveyor.
Further, the screw conveyor was designed to feed 250 kg/h.
Further, the pneumatic control device 202 is a pneumatic butterfly valve.
The air compression unit 300 of the ash storage device comprises an air compression device 301, a first filtering device 302, a freeze-drying device 303, an air storage device 304 and a second filtering device 305, wherein the air compression device 301, the first filtering device 302, the freeze-drying device 303, the air storage device 304 and the second filtering device 305 are sequentially connected.
Wherein the second filtering device 305 is respectively connected with the heating device 103 and the screw conveyer 201.
Further, the air compressing device 301 is an air compressor for generating compressed air.
Further, the first filter device 302 is a Y-filter for filtering the compressed air to remove dust and other particles from the compressed air.
Further, the freeze-drying device 303 is a freeze dryer for freeze-drying the compressed air filtered by the first filtering device 302.
Further, the air storage device 304 is an air storage tank for storing the compressed air freeze-dried by the freeze-drying device 303.
Further, the second filtering device 305 is a Y-type filter, and is used for filtering the compressed air output by the air storage device 304 to remove dust and other particulate matters in the compressed air.
The pressure relief unit 400 comprises a premixing device 401 and a vacuum relief device 402, the premixing device 401 being connected to the screw conveyor 201 and the vacuum relief device 402, respectively.
Further, a vacuum release device 402 is provided at an upper portion of the premixing device 401, preferably at the top of the premixing device 401, for preventing a vacuum from being formed in the premixing device 401.
Further, the pneumatic control device 202 is used to prevent the outlet blockage caused by the contact of the water vapor of the premixing device 401 and the fly ash at the outlet of the screw conveyor 201 when the fly ash conveying unit 200 stops operating.
The backflow unit 500 comprises a water collection device 501, a backflow control device 502, a liquid level metering device 503 and a water supplement control device 504, wherein the water collection device 501 is respectively connected with the backflow control device 502, the liquid level metering device 503 and the water supplement control device 504 of the premixing device 301, and the backflow control device 502 is connected with the premixing device 401.
Further, the water collecting device 501 is a water collecting tank.
Further, the water collecting device 501 further includes a stirring device (not shown in the figure) disposed in the water collecting device 501 for stirring the muddy water mixture in the water collecting device 501.
Further, the reflux control device 502 is a reflux pump.
Further, the liquid level metering device 503 is a liquid level meter.
Further, the water supplement control device 504 is a water supplement valve.
The use method of the feeding system for washing the fly ash comprises the following steps:
in the compressed air unit 300, the air compressing device 301 prepares compressed air, and transmits the compressed air to the first filtering device 302 for filtering, the filtered compressed air is transmitted to the freeze drying device 303 for freeze drying, the freeze-dried compressed air is transmitted to the air storage device 304 for storage, and when in use, the compressed air 305 in the air storage device 304 is filtered by the second filtering device 305 and then is transmitted to the fly ash storage unit 100 and the fly ash transmitting unit 200 respectively;
in the fly ash storage unit 100, the compressed air delivered by the compressed air unit 300 is heated by the heating device 103 and then delivered to the fluidized air system 102, the fluidized air system 102 delivers the heated compressed air into the ash storage device 101 to make the fly ash in the ash storage device 101 in a fluidized state, and the fly ash in the ash storage device 101 is correspondingly processed by the rapping device 104 and the dust removal device 105, and the fly ash is delivered to the fly ash delivery unit 200 by the ash storage device 101 for processing;
in the fly ash conveying unit 200, the spiral conveying device 201 receives the fly ash conveyed from the ash storage device 101 and conveys the fly ash to the pressure release unit 400, and the compressed air conveyed by the compressed air unit 300 sweeps the spiral conveying device 201 through the air sweeping devices 203 respectively arranged at the inlet, the outlet and the middle of the spiral conveying device 201;
in the pressure release unit 400, the premixing device 401 receives the fly ash conveyed from the screw conveyor 201 and performs premixing on the fly ash, and then conveys the premixed fly ash to the backflow unit 500, and prevents vacuum from being formed in the premixing device 401 by using the vacuum release device 402 disposed at the top of the premixing device 401;
in the backflow unit 500, the water collection device 501 receives the premixed fly ash delivered from the premixing device 401 and mixes the fly ash, the liquid level in the water collection device 501 is detected by the liquid level metering device 503, and when the liquid level in the water collection device 501 is in a normal state, the water supplement control device 504 is turned off and the backflow control device 502 is turned on, and the fly ash mixed by the water collection device 501 is delivered to the premixing device 401; when the liquid level in the water collecting device 501 is at a low liquid level, the backflow control device 502 is closed, the water supplementing control device 504 is started, and water is delivered into the water collecting device 501 through the water supplementing control device 504, so that the liquid level in the water collecting device 501 is restored to a normal state; the reflux control device 502 may be set to operate at a predetermined cycle.
The comparative effect of this example with a conventional fly ash wash feed system is shown in the following table:
note: the actual feeding amount is the average value of the actual feeding amount counted for ten times.
As can be seen from the above table, the feeding system for washing the fly ash can continuously work for 30 days without manual cleaning or intervention, the actual conveying capacity is almost consistent with the designed conveying capacity (98%), and the stable work of the whole fly ash washing system and the accuracy of material balance are ensured.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. A feed system for fly ash water scrubbing, comprising:
a fly ash storage unit;
the fly ash conveying unit is connected with the fly ash storage unit;
the compressed air unit is respectively connected with the fly ash storage unit and the fly ash conveying unit;
the pressure release unit is connected with the fly ash conveying unit;
the pressure release unit includes: the premixing device is respectively connected with the fly ash conveying unit and the backflow unit; the vacuum release device is connected with the premixing device and arranged at the top of the premixing device;
a backflow unit connected with the pressure release unit;
the fly ash conveying unit includes: the spiral conveying device is connected with the fly ash storage unit;
the spiral conveying device comprises a pneumatic control device, and the pneumatic control device is arranged at an outlet of the spiral conveying device;
the fly ash storage unit includes:
the ash storage device is connected with the fly ash conveying unit;
a heating device connected to the compressed air unit;
the compressed air unit includes:
an air compression device;
the first filtering device is connected with the air compressing device;
the freeze drying device is connected with the first filtering device;
the gas storage device is connected with the freeze drying device;
and the second filtering device is respectively connected with the gas storage device, the fly ash storage unit and the fly ash conveying unit.
2. The feed system for fly ash water washing of claim 1, wherein the ash storage device comprises:
a fluidizing air system arranged in the middle of the ash storage device
The rapping device is arranged at the middle lower part of the ash storage device;
and the dust removal device is arranged at the upper part of the ash storage device.
3. The feeding system for fly ash washing according to claim 1, wherein the screw conveyor further comprises air purge devices respectively disposed at the inlet, outlet and middle of the screw conveyor.
4. The feed system for fly ash water washing of claim 1, wherein the recirculation unit comprises:
a water collection device connected with the pressure release unit;
and the backflow control device is respectively connected with the water collecting device and the pressure release unit.
5. The feed system for fly ash water washing of claim 4, wherein the recirculation unit further comprises:
the liquid level metering device is connected with the water collecting device;
and the water supplementing control device is connected with the water collecting device.
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| CN201911115432.6A CN110759097B (en) | 2019-11-14 | 2019-11-14 | Feeding system for fly ash washing |
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| CN201911115432.6A CN110759097B (en) | 2019-11-14 | 2019-11-14 | Feeding system for fly ash washing |
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| CN206691990U (en) * | 2017-04-24 | 2017-12-01 | 茌平信发华宇氧化铝有限公司 | A kind of flyash gas delivery system |
| CN206882394U (en) * | 2017-06-28 | 2018-01-16 | 张家港市通江机械有限公司 | A kind of flying dust comprehensive utilization device |
| CN109703925A (en) * | 2018-12-27 | 2019-05-03 | 中核四0四有限公司 | A kind of pulverized fuel ash cement material pot blows bl bridge layer and method |
| CN110127224A (en) * | 2019-04-01 | 2019-08-16 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of ash library gasification system and its control method |
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