CN103062786A - Novel pulverized coal metered pneumatic storage system - Google Patents
Novel pulverized coal metered pneumatic storage system Download PDFInfo
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Abstract
The invention discloses a novel pulverized coal metered pneumatic storage system which mainly comprises a powder storage device and a powder-supplying device. The powder storage device mainly comprises a powder storage tank, a powder-making tube, a position control mechanism and an anti-self-ignite protection mechanism, wherein a bag-type dust collector is arranged at the top of the powder storage tank. The powder-supplying device mainly comprises a breaking auger, a feeding auger and a weighing auger, and the three augers are all provided with a drive mechanism. The breaking auger, the feeding auger and the weighing auger are drivingly connected with each other from up to down in a soft connection manner, the breaking auger is arranged at the feed outlet of the powder storage tank, a weighing sensor is consentingly arranged at the feed outlet of the weighing auger, a venturi is softly arranged at the feed outlet of the weighing auger, and a roots blower is arranged at the port of the venturi. The novel coal metered pneumatic storage system has the advantages that secure, stable and reliable power storing is achieved, smooth, fast and accurate powder supplying is achieved, operators' labor intensity is greatly reduced, and labor efficiency and economic benefits are increased.
Description
Technical field
The present invention relates to the coal powder storage and supply system technical field, specifically refer to the pneumatic storage and supply system of a kind of new coal powder metering-type.
Background technology
In modern industry was produced, the energy that coal combustion provides was one of important way of taking of most industry boiler.For satisfying the boiler combustion requirement, need raw coal is milled into fine powder, with certain coal-air ratio, through specific coal powder conveying system, it is sent in the boiler.The process of carrying at whole coal dust must be safe and reliable, continuous, accurate, stable.At this moment whether the parameter configuration of coal powder storage and supply system is reasonable, and accurately, can be related to whole steam generator system run well, so should treat cautiously.Requirement according to production technology, existing coal powder storage and supply system generally is divided into storage powder device and powder feeder unit, storage powder device is for storing coal dust and lasting powder feeding to powder feeder unit, burnt to boiler for powder by powder feeder unit, storage powder device and powder feeder unit complement each other, and run well to guarantee whole steam generator system.
But because the deficiencies in the prior art, existing storage powder device is in the coal dust storage process, because the effective detection precautionary measures are not set, too much or the very few situation of storage capacity often appears, safety and stability for powder is relatively poor, in addition coal dust easily spontaneous combustion in storage powder device, and the oxygen amount reduces in the device thereby can make, produce carbon monoxide, and then cause breech pressure excessive and quick-fried thorax to occur dangerous.Existing powder feeder unit is in giving the powder process, to guarantee that not only coal dust can not stop up service, but also need to be according to producing that the required energy carries out quantitatively and feed accurately, existing storage powder device and powder feeder unit are because exploitation is limited, mostly directly toward the interior storing of storage powder device, powder feeder unit adopts the direct feed of powder feeding pipe, coal dust is all easily caking obstructions in storage powder device and powder feeding pipe, and the factors such as vibration that produce of system other parts operation can affect the Cheng Chong precision of powder feeding pipe, are difficult to thus to accomplish simultaneously not stop up and feed precisely acts on.
In view of this, the inventor conducts in-depth research for the problem that existing storage and supply system exists, and this case produces thus.
Summary of the invention
The object of the present invention is to provide a kind of safe and reliable, easy to operate pneumatic storage and supply system of new coal powder metering-type, to satisfy effectively coal dust safe storage, the smooth and easy again technological requirement accurately of supply.
In order to reach above-mentioned purpose, solution of the present invention is:
The pneumatic storage and supply system of a kind of new coal powder metering-type mainly comprises storage powder device and powder feeder unit that up and down assembling arranges; Described storage powder device mainly comprises storage powder tank and makes tube cell, also comprises the material level control mechanism that storing material level in the described storage powder tank is monitored, controlled and the anti-spontaneous combustion protection mechanism that is used for preventing storing spontaneous combustion in the described storage powder tank; The described tube cell of beating is erected in the described storage powder tank, and described lower port of making tube cell is for being conveyed into the powder inlet of coal dust for strength, and upper port is meal outlet, and the position is provided with sack cleaner directly over the corresponding described meal outlet in top of storage powder tank; Described powder feeder unit mainly includes all broken auger, feeding auger and the auger of weighing with driving mechanism, this fragmentation auger, feeding auger and weigh between auger and to adopt the mode that is flexible coupling to transmit successively up and down connection, described broken auger is installed in the feed opening place of described storage powder tank, the discharge end place of the described auger of weighing is provided with LOAD CELLS, the discharging opening of this auger of weighing is flexible coupling a Venturi tube, one free port of this Venturi tube is discharging opening, and another free port is equiped with a roots blower.
Above-mentioned material level control mechanism comprises at least two level sensors and the material level control module that is electrically connected with this level sensor, described at least two level sensors are installed on the described storage powder tank, comprise the high charge level sensor and the low level sensor that are installed in respectively near described storage powder tank upper and lower side position at least in these two level sensors.
Above-mentioned at least two level sensors comprise described high charge level sensor, described low level sensor and middle level sensor, this centre level sensor is between described high charge level sensor and low level sensor, and this high charge level sensor, middle level sensor and low level sensor vertically evenly distribute on described storage powder tank.
Above-mentioned material level control module also is electrically connected with for alarm storage powder tank material stock amount and too much reaches very few alarm unit.
Above-mentioned anti-spontaneous combustion protection mechanism; should prevent that the spontaneous combustion protection mechanism comprised air supply channel and the relevant control module of temperature inductor, inert gas; described temperature inductor is installed on the storage powder tank; offer the connected entrance that is connected with the delivery outlet of described air supply channel on the described storage powder tank; described relevant control module comprises controlled processing unit and the electromagnetic valve unit that is installed on the described air supply channel, and this electromagnetic valve unit and described temperature inductor all are electrically connected with described controlled processing unit.
The said temperature inductor is provided with several, is up and down evenly at described storage powder tank to distribute, and described connected entrance is provided with several, and these several connected entrances are corresponding and be contour and be oppositely arranged one by one respectively with described several temperature inductors on described storage powder tank.
Above-mentioned broken auger comprises pusher shaft and two helical blades, this two helical blade be located at respectively described pusher shaft two ends and the hand of spiral opposite, the central bottom position of described broken auger is provided with the discharging opening that the feeding mouth with described feeding auger is flexible coupling mutually.
The discharging opening place of above-mentioned broken auger is equipped with one and is used for the Blowing stopper that powder tank and feeding auger are stored up in isolation.
Be provided with the two decompression plates that are down " V " font directly over the above-mentioned broken auger.
The drive motors of the driving mechanism of above-mentioned broken auger and feeding auger under the VFC mode, working, the described drive motors of auger under the industrial frequency control mode, working of weighing.
After adopting such scheme, the pneumatic storage and supply system of this case new coal powder metering-type, storage powder device mainly comprise storage powder tank, beat tube cell, material level control mechanism and prevent the spontaneous combustion protection mechanism; Making tube cell adopts pneumatic conveying mode to throw coal dust into the fine coal tank, sack cleaner on the storage powder tank can be in time air, steam (large quantity of air that enters when particularly beating powder) in will storage powder tank get rid of outside the tank, smooth and easy and prevent from storing up in the powder tank problem such as coal dust caking to guarantee to beat powder.
Be used for storing material level in the described storage powder tank is carried out Real-Time Monitoring and regulates control by described material level control mechanism, it is too high or too low to avoid material level occurring, thereby prevent and to cause quick-fried thorax because the material deficiency causes the powder feeding inequality, perhaps because material too much overflows, cause environmental pollution and economic loss.By preventing that the spontaneous combustion protection mechanism prevents the storing generation spontaneous combustion problem in the described storage powder tank.Powder feeder unit comprises the broken auger of screw propulsion mechanism, feeding auger and the auger of weighing, enter the coal dust of powder feeder unit at first via broken auger pressure breaking, then carried by feeding auger and the auger screw propulsion of weighing, cooperated by Luo Shi blower fan and Venturi tube at last and carry out the strength conveying for powder, guaranteed that coal dust can not stop up in pipeline, the feed situation of auger of weighing is carried out on-line metering by LOAD CELLS, all adopt the mode that is flexible coupling to connect between described each auger mechanism, the vibration that it can produce system's other parts operation etc. affects the factor of LOAD CELLS weighing precision to be eliminated, and guarantees to greatest extent thus the accuracy of weighing system.
To sum up, the pneumatic storage and supply system of metering-type of the present invention, storage powder device is realized safety, stable and reliably storage powder effect, that powder feeder unit is realized is smooth and easy for powder, supply fast and accurately the powder effect, consist of the desirable storage and supply system that a kind of storage and feed are integrated, greatly alleviate operation personnel's labour intensity, improved efficiency and Project in Operation economic benefit.
Description of drawings
Fig. 1 is the structural representation that the present invention stores up the powder device.
Label declaration
Storage powder tank 1 sack cleaner 11
Explosion proof door 12 connected entrances 13
Make tube cell 2 high charge level sensors 31
Feeding auger 52 auger 53 of weighing
Blowing stopper 54 LOAD CELLSs 55
Venturi tube 56 roots blowers 57
The specific embodiment
In order further to explain technical scheme of the present invention, the present invention will be described in detail below by specific embodiment.
This case relates to the pneumatic storage and supply system of a kind of new coal powder metering-type, as shown in Figure 1, mainly comprises storage powder device and powder feeder unit 5 that up and down assembling arranges; Described storage powder device mainly comprises storage powder tank 1, beats tube cell 2, material level control mechanism 3 and prevents spontaneous combustion protection mechanism 4 that the below elaborates all parts mechanism of storage powder device and the specific embodiment and the preferred embodiment of powder feeder unit 5.
Storage powder tank 1 is an airtight tank body, is used for storing coal dust, and the bottom of storage powder tank 1 is provided with feed opening, and the top is provided with explosion proof door 12.Make tube cell 2 and be erected in the storage powder tank 1, the upper port of making tube cell 2 is meal outlet, and lower port is powder inlet, and this powder inlet is communicated with the tank car in the external world, and tank car adopts pneumatic conveying mode, via behind the powder inlet of making tube cell 2 coal dust being thrown in the storage powder tank 1 from meal outlet.The corresponding described meal outlet position, top of storage powder tank 1 is provided with the sack cleaner 11 that includes air-introduced machine, get rid of to tank by air, steam (large quantity of air that enters when particularly beating powder) that this sack cleaner 11 will store up in the powder tank, smooth and easy to guarantee beating powder, prevent from storing up the problems such as the interior coal dust caking of powder tank, and guarantee that coal dust can not leak with air, stop secondary pollution, greatly improved boiler room environmental sanitation situation, realize cleaner production.
Described material level control mechanism 3 is used for the material level of storage powder tank 1 interior storing is carried out Real-Time Monitoring and regulates control, too high or too low to avoid occurring material level, thereby prevent and to cause quick-fried thorax because the material deficiency causes the powder feeding inequality, perhaps because material too much overflows, cause environmental pollution and economic loss.The below provides a preferred embodiment of material level control mechanism 3, comprise at least two level sensors and material level control module (not shown), described at least two level sensors all are electrically connected on the signal input part of described material level control module, the material level control module preferably can also be electrically connected with the alarm unit (not shown), is used for sending when storage powder tank 1 material stock amount is too much and very few alarm signal.Level sensor is installed on the sidewall of storage powder tank 1, in the specific embodiment that provides, described level sensor is provided with 5 altogether, comprise a high charge level sensor 31, a low level sensor 32 and three middle level sensors 33, level sensor 33 and a low level sensor 32 vertically are up and down successively Multi-layers distributing in the middle of this high charge level sensor 31, three on the sidewall of storage powder tank 1, preferably also be uniformly-spaced and evenly distribute, high charge level sensor 31 is near the upper end position setting of storage powder tank 1, and low level sensor 32 is near the lower end position setting of storage powder tank 1.
During material level control mechanism 3 work, accurate storage condition by each level sensor monitoring storage powder tank 1 interior material, wherein high charge level sensor 31 and low level sensor 32 are used in particular for respectively monitoring maximum amount and the minimum flow situation of material, when material approaches low material level, after low level sensor 31 detects, coherent signal is sent to the material level control module, in time interior reinforced toward storage powder tank 1 by material level control module control tank car, preferably can also give the alarm by alarm, thereby prevent from causing quick-fried thorax because the material deficiency causes the powder feeding inequality; Otherwise, when bank during to high charge level, after same high charge level sensor 32 detects, stop toward storage powder tank 1 interior reinforced with reason material level control module control charging (feeding) equipment, preferably can also give the alarm by alarm, thereby prevent from causing environmental pollution and economic loss because material too much overflows.Security, stability and the reliability of storage powder can system quantitatively supplying powder have greatly been improved thus by described material level control mechanism.
Described anti-spontaneous combustion protection mechanism 4 is for the storing generation spontaneous combustion problem that prevents from storing up in the powder tank 1; the embodiment of anti-spontaneous combustion protection mechanism 4 can have multiple; the below provides a preferred embodiment; should comprise temperature inductor 41 by anti-spontaneous combustion protection mechanism 4; the air supply channel 42 of inert gas and relevant control module; described temperature inductor 41 is installed on the storage powder tank 1; offer the connected entrance 13 that is connected with the delivery outlet of air supply channel 42 on 1 the sidewall on the storage powder tank; described relevant control module comprises controlled processing unit (not shown) and electromagnetic valve unit 43; this electromagnetic valve unit 43 is installed on the air supply channel 42; be used for the keying of control air supply channel 42, described electromagnetic valve unit 43 all is electrically connected with described controlled processing unit with temperature inductor 41.
During anti-spontaneous combustion protection mechanism 4 work; by the Temperature Distribution in the whole storage powder of the temperature inductor 41 Real-Time Monitorings tank 1; when temperature inductor 41 temperature sensors surpass certain value (for example 65 ℃); warning system gives the alarm; electromagnetic valve unit 43 on the air supply channel 42 is opened automatically; by the quantitative inert gas (for example carbon dioxide) of connected entrance 13 ejections; inert gas is deposited in the material surface; form the about 1 meter inert gas cover of thick layer; can realize that (in about 20 seconds) make the coal dust cooling at short notice; effectively prevent its spontaneous combustion; obviously lower thus the risk of spontaneous combustion of pulverized coal; the spontaneous combustion incidence is almost nil, has greatly improved the security of coal dust storage powder tank.
Because spontaneous combustion occurs in coal dust under given conditions easily, further, described temperature inductor 41 is provided with several, be up and down multilayer and evenly distribution at storage powder tank 1, connected entrance 13 on the storage powder tank 1 is provided with several, these several connected entrances 13 and 41 respectively one by one corresponding setting of described several temperature inductors, concrete, this temperature inductor 41 and connected entrance 13 corresponding each are organized storing up powder tank 1 and are contour and are oppositely arranged.Thus, when a certain temperature inductor 41 detect after the uniform temperature, protected by the connected entrance 13 ejection inert gases of correspondence, realize fast, in time, accurate effective anti-spontaneous combustion defencive function again.
Described powder feeder unit 5 mainly comprises all and also to include LOAD CELLS 55, Venturi tube 56 and roots blower 57 with broken auger 51, the feeding auger 52 of driving mechanism, the auger 53 of weighing.Described broken auger 51, feeding auger 52 and 53 employings of auger of weighing mode that is flexible coupling transmits connection from top to bottom successively, concrete, described broken auger 51 is installed in the feed opening place of storage powder tank 1, one preferred embodiment of this fragmentation auger 51, comprise a pusher shaft and two helical blades, the central bottom position of broken auger 51 is provided with discharging opening, and the feeding mouth of this discharging opening and feeding auger 52 is flexible coupling mutually.Described two helical blades be located at respectively described pusher shaft two ends and the hand of spiral opposite, thus when pusher shaft rotates, the material at two ends can be toward middle extruding under the screw propulsion of two helical blades, finally send into feeding auger 52 via being flexible coupling by the discharging opening of described broken auger 51, described two helical blades push toward middle coal dust, adopt the pressure breaking mode that the coal cinder of coal dust deadweight extruding caking is broken up, to reach the pressure breaking effect, guarantee when coal dust enters feeding auger 52 to be powdery.
Provide among the embodiment, the lower end of storage powder tank 1 is provided with two discharging openings, corresponding broken auger 51 is provided with two, their discharging opening all is flexible coupling to the feeding mouth of feeding auger 52, the discharging opening of feeding auger 52 is flexible coupling to the feeding mouth of the auger 53 of weighing, and the discharge end place of the auger 53 of weighing is provided with LOAD CELLS 55, weighs by this LOAD CELLS 55, and in the metering system of device, realize adding up, can understand in real time speed and the accumulative total air output of powder feeding.The discharging opening of auger 53 of weighing is flexible coupling a Venturi tube 56 is arranged, and a free port of this Venturi tube 56 is discharging opening, and another free port is equiped with a roots blower 57.The driving mechanism of described broken auger 51, feeding auger 52 and the auger 53 of weighing is drive motors, wherein system carries out VFC to the drive motors of broken auger 51 and feeding auger 52, variation and LOAD CELLS 55 feedack regulating electric machine frequencies size according to boiler load, reach the purpose of regulating powder sending quantity by the regulation and control rotating speed, the drive motors of the heavy auger 53 of symmetry system having symmetry carries out industrial frequency control, be used for to guarantee to weigh and do not occur stopping up in the auger, and guarantee weighing precision, weighing precision of the present invention can reach 0.1KG.
During powder feeder unit 5 work, coal dust in the storage powder tank 1 enters broken auger 51 interior fragmentations via its discharging opening, coal dust after fragmentation is successively via feeding auger 52 and the auger 53 of weighing, evenly give powder by the screw propulsion mode, Venturi tube 56 is sent and entered to final coal dust by the discharging opening of the auger 53 of weighing, produce under the wind action of the low air quantity of high blast at roots blower 57 afterwards, by Venturi tube 56 coal dust is broken up in pipeline, finally blow in the burner hearth.
Described to powder device 5 at first via broken auger 51 pressure breakings, then carried by feeding auger 52 and auger 53 screw propulsions of weighing, cooperated by Luo Shi blower fan 57 and Venturi tube 56 at last and carry out the strength conveying for powder, guaranteed that coal dust can not stop up in pipeline, the feed situation of auger 53 of weighing is carried out on-line metering by LOAD CELLS 55, all adopt the mode that is flexible coupling to connect between described each auger mechanism, the vibration that it can produce system's other parts operation etc. affects the factor of LOAD CELLS 55 weighing precisions to be eliminated, and guarantees to greatest extent thus the accuracy of weighing system.This case is carried out Real-Time Monitoring by the correlative flow mechanism for monitoring to pulverized coal flow to the powder device is also better, it is constant to control auger 53 running speeds of weighing, and after carrying out analyzing and processing according to the signal of the situation of change of boiler load and weight sensor feedback, the powder feed rate of controlled fragmentation auger 51 and feeding auger 52, further guarantee thus to weigh and do not stop up in the auger, and optimize weighing precision.
In addition, the present invention further also is provided with the two decompression plates 58 that are down " V " font directly over broken auger 51, the bottom of this two decompressions plate 58 is the mode that is crossed on broken auger 51 central shaft both sides and arranges, characteristic according to the coal dust gravity flow, what the gradient that decompression plate 58 arranges was better is 70 degree, coal dust in the storage powder tank 1 can enter along decompression plate 58 natural landings and by the both sides of broken auger 51, all coal dust all transfers out after broken auger 51 fragmentations again, key is the pressure release effect by decompression plate 58, reduce the pressure that broken auger 51 bears, guaranteed broken auger 51 normal operations.Have, the discharging opening place of described broken auger 51 also is equipped with a Blowing stopper 54 again, and this Blowing stopper 54 is used for isolation storage powder tank 1 and feeding auger 52, thereby guarantees that further weighing system is stable.
To sum up, the pneumatic storage and supply system of metering-type of the present invention, the mutual coordinated of each structure of storage powder device, realize safety, stable and reliably storage powder effect, the flexible design of powder feeder unit structure realizes that the confession powder is smooth and easy, supply the powder effect fast and accurately, finally consists of the desirable storage and supply system that a kind of storage and feed are integrated, greatly alleviate operation personnel's labour intensity, improved efficiency and Project in Operation economic benefit.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (10)
1. the pneumatic storage and supply system of new coal powder metering-type mainly comprises storage powder device and powder feeder unit that up and down assembling arranges; It is characterized in that: described storage powder device mainly comprises storage powder tank and makes tube cell, also comprises the material level control mechanism that storing material level in the described storage powder tank is monitored, controlled and the anti-spontaneous combustion protection mechanism that is used for preventing storing spontaneous combustion in the described storage powder tank; The described tube cell of beating is erected in the described storage powder tank, and described lower port of making tube cell is for being conveyed into the powder inlet of coal dust for strength, and upper port is meal outlet, and the position is provided with sack cleaner directly over the corresponding described meal outlet in top of storage powder tank; Described powder feeder unit mainly includes all broken auger, feeding auger and the auger of weighing with driving mechanism, this fragmentation auger, feeding auger and weigh between auger and to adopt the mode that is flexible coupling to transmit successively up and down connection, described broken auger is installed in the feed opening place of described storage powder tank, the discharge end place of the described auger of weighing is provided with LOAD CELLS, the discharging opening of this auger of weighing is flexible coupling a Venturi tube, one free port of this Venturi tube is discharging opening, and another free port is equiped with a roots blower.
2. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 1, it is characterized in that: above-mentioned material level control mechanism comprises at least two level sensors and the material level control module that is electrically connected with this level sensor, described at least two level sensors are installed on the described storage powder tank, comprise the high charge level sensor and the low level sensor that are installed in respectively near described storage powder tank upper and lower side position at least in these two level sensors.
3. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 2, it is characterized in that: above-mentioned at least two level sensors comprise described high charge level sensor, described low level sensor and middle level sensor, this centre level sensor is between described high charge level sensor and low level sensor, and this high charge level sensor, middle level sensor and low level sensor vertically evenly distribute on described storage powder tank.
4. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 2 or claim 3 is characterized in that: above-mentioned material level control module also is electrically connected with for alarm storage powder tank material stock amount too much and very few alarm unit.
5. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 1; it is characterized in that: above-mentioned anti-spontaneous combustion protection mechanism; should comprise temperature inductor by anti-spontaneous combustion protection mechanism; the air supply channel of inert gas and relevant control module; described temperature inductor is installed on the storage powder tank; offer the connected entrance that is connected with the delivery outlet of described air supply channel on the described storage powder tank; described relevant control module comprises controlled processing unit and the electromagnetic valve unit that is installed on the described air supply channel, and this electromagnetic valve unit and described temperature inductor all are electrically connected with described controlled processing unit.
6. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 5, it is characterized in that: the said temperature inductor is provided with several, be up and down evenly distribution at described storage powder tank, described connected entrance is provided with several, and these several connected entrances are corresponding and be contour and be oppositely arranged one by one respectively with described several temperature inductors on described storage powder tank.
7. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 1, it is characterized in that: above-mentioned broken auger comprises pusher shaft and two helical blades, this two helical blade be located at respectively described pusher shaft two ends and the hand of spiral opposite, the central bottom position of described broken auger is provided with the discharging opening that the feeding mouth with described feeding auger is flexible coupling mutually.
8. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 1 is characterized in that: the discharging opening place of above-mentioned broken auger is equipped with a Blowing stopper that is used for isolation storage powder tank and feeding auger.
9. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 1 is characterized in that: be provided with the two decompression plates that are down " V " font directly over the above-mentioned broken auger.
10. the pneumatic storage and supply system of a kind of new coal powder metering-type as claimed in claim 1, it is characterized in that: the drive motors of the driving mechanism of above-mentioned broken auger and feeding auger under the VFC mode, working, the described drive motors of auger under the industrial frequency control mode, working of weighing.
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| CN105021252A (en) * | 2015-03-14 | 2015-11-04 | 青岛青义锅炉有限公司 | Level gage for pulverized coal bunker of pulverized coal fired boiler |
| CN109016106A (en) * | 2018-07-27 | 2018-12-18 | 长兴荣力机械有限公司 | A kind of refractory brick automatic distributing device |
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| CN105021252A (en) * | 2015-03-14 | 2015-11-04 | 青岛青义锅炉有限公司 | Level gage for pulverized coal bunker of pulverized coal fired boiler |
| CN109016106A (en) * | 2018-07-27 | 2018-12-18 | 长兴荣力机械有限公司 | A kind of refractory brick automatic distributing device |
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Application publication date: 20130424 Assignee: Jinjiang Meichuang Environmantal Protection Equipment Co., Ltd. Assignor: Fujian Eternal Energy Management Co., Ltd. Contract record no.: 2016350000045 Denomination of invention: Novel pulverized coal metered pneumatic storage system Granted publication date: 20150520 License type: Exclusive License Record date: 20161108 |
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