The aerosol dust pelletizing system
Technical field
The utility model relates to the dedusting technology field of defeated device for coal, refers in particular to a kind of aerosol dust pelletizing system.
Background technology
The coal-burning power plant is in the process that bunker coal is carried; The discharging point, bunker bay coal breakage bucket place, the underground of circular coal bunker that comprise each transfer station at each reloading point are unloaded the coal bunker place because the drop of bunker coal transhipment is big; The deflector chute sealing is poor; Around coal conveyer belt head coal spout and afterbody coal breakage deflector chute etc. local coal dust fly upward very seriously, have a strong impact on operations staff's health.Though adopted dedusting technologies such as bag-type dust, wet dust removal, high-pressure electrostatic precipitation to this present situation, and the technology of auxiliary water mist dust-removing control reentrainment of dust, dust removing effects is not ideal enough, and reentrainment of dust is still serious.
The water mist dust-removing system mainly is made up of water lines and control system, promptly is made up of delivery pipe branch road, filter, manually-operated gate, magnetic valve, coal flow sensor, belt rotation sensor, Moisture Meter, control cabinet, nozzle and annex.Water mist dust-removing system atomizing effect is poor, and water consumption is many, because the flushing water that power plant adopts mostly is a secondary recovery water; Contain certain impurity in the water; Time has been grown, and causes equipment such as pipeline, nozzle, magnetic valve to stop up easily, and system's hydraulic pressure receives the influence of power plant's industry water pipe network water pressure fluctuation.
The utility model content
The utility model purpose of the utility model provides the good and aerosol dust pelletizing system that control easily of a kind of dust removing effects.
The utility model is achieved in that
A kind of aerosol dust pelletizing system; Comprise aerosol device and a plurality of nozzle; Said nozzle is located at except that dirt pits, is provided with control module, the air pump that is connected with said control module and aerosol case in the said aerosol device, and the tracheae of drawing from said aerosol case is communicated with the formation gas circuit with said nozzle; Said aerosol device is communicated with the water source and said aerosol device is also drawn water pipe and be communicated with the formation water route with said nozzle, and said water route and said gas circuit are mixed at said nozzle place.
Preferably, the rotation sensor that said aerosol dust pelletizing system also includes the run signal that is used to detect belt be located at the coal flow sensor on the said belt, said rotation sensor all is connected with said control module with said coal flow sensor.Before belt begins carry coal; Said aerosol dust pelletizing system starts; After said control module was received the coal stream signal that detected run signal of said rotation sensor and said coal flow sensor sense, said aerosol device brought into operation, and said water route and said gas circuit are communicated with; Water, gas mix at said nozzle place, produce the aerosol dedusting.
Preferably, said aerosol device also includes air pump and gas pressure pressure regulator valve, and said air pump and said gas pressure pressure regulator valve are located at respectively on the said gas circuit, and said air pump is connected with said control module.Through said air pump and said gas pressure pressure regulator valve control air pressure.
Further, said aerosol device also includes water pump and fluid pressure control valve, and said water pump and said fluid pressure control valve all are located on the said water route, and said water pump is connected with said control module.
Through controlling the said water pump control water yield, through said air pump adjustments of gas pressure, simultaneously; Through regulating said fluid pressure control valve and said gas pressure control valve air pressure, improve atomizing effect, improve the water droplet amount; Thereby improve the probability that combines of aerosol and coal dust, the raising dust removing effects; But; The flow of water is unsuitable excessive, and the water content in the fuel is too high not only can to impact combustion efficiency, but also causes fuel on belt, to skid easily or cause phenomenon such as coal spout obstruction; Therefore, need guarantee that the water content in the bunker coal is controlled in 6% after dedusting.
Get in the water route for fear of foreign material; The water pipe that said aerosol device connects between the water source is provided with filter, accurate filter, backwash filter and hand-operated valve; Through said filter, said accurate filter and said backwash filter, avoid impurity to get in the water route.
Preferably, said gas circuit also is provided with the gas circuit filter.
Preferably, said nozzle is located at leather belt head portion coal spout place and/or strap end coal breakage batch turning groove place.
Preferably, said nozzle adopts horizontal mounting means to install or adopts vertical mounting means to install.
The utility model compared with prior art has following beneficial effect:
Compare the water mist dust-removing system that generally adopts at present and have incomparable advantage:
1) atomizing effect is good, and aerosol dedusting particle water diameter is 1 μ m-10 μ m, is merely 1/10 of water mist dust-removing particle, combines with the dust molecule more easily, reaches the purpose of dust suppression.
2) water-saving performance is good, and the aerosol dedusting fully atomizes water, and injection flow rate is merely 1/8 of water mist dust-removing, this just guaranteed in dedusting not can with coal beat wet excessively, thereby cause the coal spout phenomenon of blocking.
3) pipeline is difficult for stopping up, because the flushing water that adopt at power plant or harbour mostly is a secondary recovery water, contains certain impurity in the water, and the time has been grown, and causes equipment such as pipeline, nozzle, magnetic valve to stop up easily, thereby influences the normal use of entire equipment; In the aerosol dust pelletizing system, through the control of control module, regularly use the high pressure draught flushing pipe, the prevention line clogging has avoided the interior ponding of pipeline to freeze simultaneously.
4) the pressure modulability is good, and the aerosol dust pelletizing system has disposed water pump, air pump, simultaneously fluid pressure control valve and gas control valve has been installed on pipeline, can regulate water, atmospheric pressure in the pipeline easily, thus the control spray effect.
5) regulate hydraulic pressure and air pressure automatically according to the hydraulic pressure of outer net pipeline, make the mixed aerosol effect of water and air reach best.
6) in addition, this aerosol dust pelletizing system also possess skills less equipment investment, easy to operate, automaticity is high, floor space is little, water consumption is low, operating cost is low, advantages such as non-secondary pollution.
Description of drawings
Fig. 1 is the structural representation of the utility model aerosol dust pelletizing system;
Fig. 2 is the distribution map of the utility model aerosol dust pelletizing system at transfer station;
Fig. 3 is the distribution schematic diagram one of the shower nozzle of the utility model aerosol dust pelletizing system;
Fig. 4 is the distribution schematic diagram two of the shower nozzle of the utility model aerosol dust pelletizing system.
The specific embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing:
Like Fig. 1 and shown in Figure 2; The aerosol dust pelletizing system comprises aerosol device 1 and a plurality of nozzle 2; Said nozzle 2 is located at except that dirt pits, is provided with control module, the air pump that is connected with said control module and aerosol case in the said aerosol device 1, and the tracheae 4 of drawing from said aerosol case is communicated with the formation gas circuit with said nozzle 2; Said aerosol device is communicated with the water source and said aerosol device is also drawn water pipe 3 and be communicated with the formation water route with said nozzle, and said water route and said gas circuit are mixed at said nozzle place.Through pressure water and gas are transported to nozzle 2, water and gas is in nozzle 2 internal mix, thereby produces the spraying of atomizing fully, spraying be shaped as that circle, wide-angle are circular, 360 ° of annulars, fan-shaped and deflection are fan-shaped etc.
In the utility model; Said nozzle 2 is located at leather belt head portion coal spout place; With strap end coal breakage deflector chute place; The quantity of said nozzle 2 can be according to the width setting of belt, for example: width is greater than three nozzles 2 of belt arrangement of 1200mm, and width is less than two nozzles 2 of belt arrangement of 1200mm.Said nozzle 2 adopts horizontal mounting means that (as shown in Figure 3, direction shown in the arrow is a belt direction of travel) is installed, or adopts vertical mounting means that (as shown in Figure 4) is installed.
Said aerosol device 1 also includes air pump and gas pressure pressure regulator valve, and said air pump and said gas pressure pressure regulator valve are located at respectively on the said gas circuit, and said air pump is connected with said control module.Through said air pump and said gas pressure pressure regulator valve control air pressure.Further, said aerosol device 1 also includes water pump and fluid pressure control valve, and said water pump and said fluid pressure control valve all are located on the said water route, and said water pump is connected with said control module.Said gas circuit also is provided with gas circuit filter 10.
Through controlling the said water pump control water yield, through said air pump adjustments of gas pressure, simultaneously; Through regulating said fluid pressure control valve and said gas pressure control valve air pressure, improve atomizing effect, improve the water droplet amount; Thereby improve the probability that combines of aerosol and coal dust, the raising dust removing effects; But; The flow of water is unsuitable excessive, and the water content in the fuel is too high not only can to impact combustion efficiency, but also causes fuel on belt, to skid easily or cause phenomenon such as coal spout obstruction; Therefore, need guarantee that the water content in the bunker coal is controlled in 6% after dedusting.
Nozzle 2 is that 3bar, air pressure are under the state of 3bar at hydraulic pressure, and dust removing effects the most obviously and not can cause the water content of coal too high, and under this state, discharge is 1.27 (I/min).For the influence that the work water pressure that guarantees nozzle 2 is not fluctuateed by the industry water ductwork pressure, can regulate the pressure of water pump and air pump according to the hydraulic pressure of outer net pipeline automatically, make the mixed aerosol effect of water and air reach best.
In order to make said aerosol dust pelletizing system can reach automation control; Like Fig. 1 and shown in Figure 2; The rotation sensor 5 that said aerosol dust pelletizing system also includes the run signal that is used to detect belt be located at the coal flow sensor 6 on the said belt, said rotation sensor 5 all is connected with said control module with said coal flow sensor 6.Before belt begins carry coal; Said aerosol dust pelletizing system starts; After said control module was received the coal stream signal that said rotation sensor 5 detected run signal and said coal flow sensor 6 sense, said aerosol device 1 brought into operation, and said water route and said gas circuit are communicated with; Water, gas mix at said nozzle 2 places, produce the aerosol dedusting.
Get in the water route for fear of foreign material; Water pipe 3 between the said aerosol device 1 connection water source is provided with filter 7, accurate filter 8 and backwash filter 9; Through said filter 7, said accurate filter 8 and said backwash filter 9, avoid impurity to get in the water route.
Preferably; For the ease of control; Also be provided with magnetic valve 11, check-valves 13, pressure-regulating valve 14 and hand-operated valve 15 on the said water pipe 3; And also be provided with pneumatic operated valve 12, check-valves and hand-operated valve on the said tracheae 4, and the set-up mode of said magnetic valve, pneumatic operated valve, check-valves and hand-operated valve has belonged to prior art, and the utility model repeats no more at this.
More than be merely the specific embodiment of the utility model, do not limit the protection domain of the utility model with this; Do not violate any replacement and the improvement of being done on the basis of the utility model design, all belonging to the protection domain of the utility model.