CN203116062U - Rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization - Google Patents
Rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization Download PDFInfo
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Abstract
The utility model relates to a rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization. The rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization comprises a boiler and a turbine, and further comprises a feeding system in front of the boiler and a raw coal sodium-removal system, wherein the feeding system in front of the boiler comprises a drying tube, a coal miller and a coal powder distributor, the drying tube, the coal miller and the coal powder distributor are sequentially communicated in a series mode, and the coal powder distributor is communicated with a combustor of the boiler; the raw coal sodium-removal system comprises a gas exhausting condensing recovery device, a raw coal sodium-removal device, a coal-water separation device and a waste water processing device, and the gas exhausting condensing recovery device, the raw coal sodium-removal device, the coal-water separation device and the waste water processing device are sequentially communicated in a series mode. The rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization has the advantages of being capable of reducing alkali metal content in raw coal, greatly relieving or radically solving the problems of coking inside the boiler, contamination and corrosion of a heated surface of a high sodium coal generating set, effectively applied to purification and quality-improvement process of zhundong coal and other fault coal high in content of sodium and water, simple in technology, safe to operate, low in investment, energy-saving, environmental-friendly, cycling and economical.
Description
Technical field
The utility model belongs to the coal power generation technical field, relates to high sodium coal power generation technology, says with having, relates to a kind of high sodium coal and takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system.
Background technology
High sodium coal refers to the higher special coal of a class of alkali metal compound composition in the coal.In all kinds of alkali metal compounds, generally in the majority with the sodium based compound, so be referred to as " high sodium coal ".At present, the high sodium coal of China mainly concentrates on the accurate eastern coalfield of Xinjiang Junggar Basin east, and accurate eastern coalfield resources reserves reach 3,900 hundred million tons, and adding up at present to verify the coal resources reserves is 2,136 hundred million tons, 1.4 ten thousand square kilometres of coalfield coal-forming areas are the self-contained coalfields of the current maximum of China.Calculate with present coal in China annual production, just can use 100 years in the whole nation in the eastern coalfield of standard.Because resources reserve is abundant and the strip mining transformation cost is low, accurate eastern coalfield has become the hot zones of coal in China industry new round investment.
Accurate eastern coal belongs to the natural clean coal of high-quality of special low ash content, special low-sulfur, high heating value (high calorific power), low metamorphic grade.No matter be as generating or be used for doing the raw material of Coal Chemical Industry, all be lowly pollute, the lustration raw material of low emission, can effectively save the treatment of wastes produced expense.Good material base has been laid in all the be as the criterion coal electricity in east area and the development of Coal Chemical Industry of these superior natural conditions.Xinjiang generation current total installation of generating capacity is 1,800 ten thousand KW, and according to country " 12 " planning, 12 last Xinjiang will reach 100,000,000 KW, and wherein accurate eastern coalfield is " Xin Diandong send " topmost energy safeguard base.
On the whole, the ature of coal in area, accurate east has following characteristics: middle high-moisture; Medium calorific capacity; Easily catch fire, easy to burn out; Strong coking; High basic metal content, contamination property by force.At present, strong coking has proposed great challenge with strong contamination property to design and the operation of firing accurate eastern coal utility boiler, the result of trial operation of low capacity unit shows, when firing accurate eastern coal entirely in the boiler stove coking very serious with heating surface contamination problem, boiler can't long-time running.Trace it to its cause, these problems all with coal ash in alkali metal content higher closely related.
At present, each electricity power enterprise of China builds the power plant in area, accurate east, the accurate eastern coal that can only utilize 20-30% with mix burning after other coal is mixed, it is very limited to aim at eastern coal use amount like this, again from other local high-quality fire coal of buying, increased the cost of electricity-generating of electricity power enterprise simultaneously.Aim at the exploitation in eastern coalfield and the construction in power supply base and brought difficulty, therefore be difficult to the advantage of the eastern coal of standard is given full play to.
Other mixes the burning way for the another kind that generates electricity in order to utilize the eastern high sodium coal of standard: admix a silicon of fixing a number or alundum (Al etc. as adopting, can adjust the ash fusion point of stove internal combustion, can adopt accurate eastern high sodium coal in boiler, to burn more, also can play certain contamination that improves boiler and the problem of slagging scorification, but increased the effect of attrition boiler service life of boiler simultaneously and reduced coal-fired calorific capacity, this makes the operating cost that must increase construction investment and power plant again.
Therefore, how to reduce the alkali metal content in the accurate eastern coal, safe and economical boiler operation is over a long time guaranteed in anti-slagging scorification, contamination and corrosion, being electricity power enterprise and other industry institute inevitable problem that uses accurate eastern coal, also is the significant challenge that the construction of base of the accurate eastern coal electricity of current development faces.
In addition, the ature of coal moisture in area, accurate east is more, in the prior art, generally adopts fanned powder-grinding system or medium-speed pulverizer pulverized coal preparation system at the pulverized coal preparation system at the large-sized boiler of middle hydrogenous coal.Be to pass through moisture-free coal in this pulverized coal preparation system, the evaporation of water in the coal is become weary gas ((the temperature reduction is that the drier after drying capacity reduces is called weary gas)), grind coal then and become coal dust, send coal dust and weary gas to the burner hearth burning in the lump simultaneously, will enter in the atmosphere in the lump with chimney then.Because the weary gas of high-moisture is admitted to burner hearth, makes the inner flue gas of the stove amount increase, and reduced fire box temperature.
At above-mentioned deficiency, once applied for that the Shen Granted publication number be the Chinese patent of CN202229208U, " a kind of stove cigarette drying and water reclaim warehouse formula fan and grinds the pulverized coal carried by hot air pulverized coal preparation system " before the applicant.This system comprises boiler, is connected in series run coal bin, drying tube, medium-speed pulverizer, the mill separator that is communicated with, pulverized coal distributor successively; Described coal dust classifier is communicated with the burner of boiler again, also comprise mixing chamber, this mixing chamber first air inlet and second air inlet are communicated with smoking mouth and the cold smoke blower fan of boiler respectively, what described cold smoke extension set was communicated with boiler is located at flue tail flue gas dust removal device, the gas outlet of described mixing chamber is communicated with drying tube again, the other pressure fan that is provided with of described boiler flue, this pressure fan air preheater interior with being located at flue is communicated with, it is characterized in that: also be provided with weary gas separating device between described mill separator and the pulverized coal distributor successively, the fine coal storehouse, machine supplying powder and coal, pulverulent fuel mixer, described weary gas separating device top has weary gas outlet, should weary gas outlet be communicated with weary air filter, the coal outlet of described weary air filter is communicated with the fine coal storehouse again, the gas outlet of weary gas separating device is communicated with a weary gas blower fan, and this weary gas blower fan is communicated with desulfurizing tower again; Described air preheater also is communicated with coal, pulverulent fuel mixer.
By such setting, because the weary gas of steam that includes that produces does not together enter burner hearth in company with dried coal, and the interior temperature of stove is raise, and helps to improve fuel economy, the heating surface area of boiler can be reduced, boiler volume and manufacturing cost can be obviously lowered.In addition, this system is very low as its oxygen content of drier with high-temperature flue gas and cold smoke, has so just avoided the generation of brown coal deflagration accident havings in dry shattering process.In addition, the utility model is sent dried brown coal into burner with hot blast, and one side can suitably improve the outlet temperature behind the coal pulverizer, can significantly improve the flammability of fuel like this, the boiler low load stable combustion performance strengthens, and enough hot-airs are arranged when guaranteeing boiler combustion on the other hand.
But the sodium that takes off that does not fully take into account high sodium coal in the said structure is handled, and how to utilize heat energy and the moisture that contains in the weary gas, and the energy recovery of weary gas and water reclaim not enough, cause a large amount of heat energy and water resource to be wasted.
The utility model content
The purpose of the utility model embodiment is the deficiency at technology in the prior art, propose a kind of high sodium coal and take off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, take off sodium and weary gas energy recovery and water in mainly solving in the high sodium coal power generation of the high-moisture technology reclaim problem, the heat energy of Hui Shouing can be used for taking off the sodium processing simultaneously, has benefit energy-conservation, that fall originally, improve economy.
In order to reach above-mentioned utility model purpose, a kind of high sodium coal that the utility model proposes takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, is achieved through the following technical solutions:
A kind of high sodium coal takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, comprises boiler and steam turbine, it is characterized in that described electricity generation system also comprises:
The front-furnace feeding system comprises being connected in series drying tube, coal pulverizer and the pulverized coal distributor that is communicated with successively, also comprises coal collector and weary gas cooler; Described pulverized coal distributor is communicated with the burner of described boiler; The entrance of the air preheater in the described boiler flue connects pressure fan, and its outlet is divided into two-way, and one the tunnel connects described burner, and another road connects the air inlet of described coal pulverizer bottom; The weary gas import of described coal collector is communicated with the exhaust outlet of described drying tube, the meal outlet of this coal collector connects the coal feed point of described coal pulverizer, the weary gas outlet of this coal collector connects weary gas blower fan, the outlet of described weary gas blower fan is divided into two-way, one tunnel primary side air inlet that is communicated with described weary gas cooler wherein, another road is communicated with fluid bed in the described drying tube; Also be provided with first steam-heating pipe that takes off the sodium coal for drying in the described drying tube, the import of this first steam-heating pipe is connected to described turbine bleed point; Form the refrigerant flowing space in the secondary side of described weary gas cooler;
Raw coal takes off sodium system, comprise for the weary air cooling of reclaiming weary gas moisture and heat and coagulate retracting device, the raw coal that is used for the high sodium raw coal of washing takes off the sodium device, being used for will be from described raw coal taking off of taking off that the sodium device the comes out moisture content of coal that the sodium coal separates with the waste water that is dissolved with alkali metal from device, and is used for wastewater treatment equipment that the waste water after the separation is handled; The air inlet that retracting device is coagulated in described weary air cooling is communicated with the exhaust outlet of described coal collector, and its warm water outlet is taken off the sodium device with described raw coal and is communicated with; Described raw coal takes off the sodium device and is provided with for second steam-heating pipe that heats coal-water mixture, and the import of described second steam-heating pipe is connected to the outlet of first steam-heating pipe, and the outlet of described second steam-heating pipe is connected to described boiler through coagulating the water device; Described moisture content of coal connects described drying tube from the coal outlet of device by defeated device for coal; Described wastewater treatment equipment has circulating water outlet and sodium potassium concentrated solution outlet, and described circulating water outlet is connected to the cold water inlet that retracting device is coagulated in described weary air cooling.
The spray chamber that retracting device has sealing is coagulated in described weary air cooling, and this spray chamber is provided with the shower nozzle that is communicated with described cold water inlet at least.
The cold weary gas outlet that retracting device is coagulated in described weary air cooling is connected to desulfurizing tower.
The outlet of described coal pulverizer arranges mill separator.
Described coal pulverizer is medium-speed pulverizer.
Described raw coal takes off sodium system and also comprises heat-energy recovering apparatus, and the primary side entrance of this heat-energy recovering apparatus is communicated with the wastewater outlet of described moisture content of coal from device, and its side outlet is communicated with described wastewater treatment equipment, forms the refrigerant flow path in its secondary side.
The utility model has proposed a kind of high sodium coal and has taken off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, has following characteristics:
1, high basic metal content is high raw coal is under certain raw coal diameter, under the effect of the wash solution of uniform temperature and pressure, destroyed the raw coal stability of structure, make the alkali metal in the raw coal that migration and dissolving take place, thereby reduced the sodium in the coal, ash, mercury, sulphur, etc. element, the quality technology that improves coal is simple, and security of operation is invested little;
2, raw coal is washed ash and is taken off and keep uniform temperature in the sodium device to be conducive to the alkali metal material water-soluble from coal, keep the required thermal source of uniform temperature from condense used heat and to weary gas tow taste heat of the steam of coal-burning power plant, realize utilizing used heat to wash ash thus and taken off sodium, had obvious energy-saving effect.
3, the required moisturizing of system both can also can utilize the water resource that reclaims from external water source from raw coal, by reclaiming for the moisture in the weary gas, at last by reduce temperature to below the water dew point so that moisture is fully extracted.
4, system's output takes off the sodium coal by behind the drying and upgrading, having become the clean coal of high-quality can be directly used in as industrial chemicals or for coal-fired powder generating set, fire coking and heating surface contamination problem in the stove that high sodium coal power generation unit faces and improved alkali-metal etching problem to boiler body thereby significantly improve or solved at all, solved the sodium vapor separation problem in the Coal Chemical Industry gasification simultaneously.
5, the liquid after coal liquid separates enters wastewater treatment equipment, and isolated sodium potassium concentrate is recyclable for alkali processed and potash fertilizer production.
6, will lack the water resource that can reclaim in a large number after the air cooling but in the coal, and can be used as system water supplement.
7, the coal after purifying is carried out drying and handle, the moisture content that removes in the coal improves the quality of coal greatly.
Therefore, take off high sodium coal of the present utility model sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system have realized the alkali metal content in the high sodium coal of effective reduction, the advantage that have that technology is simple, security of operation, investment are little, can fully effectively utilize coal fired power plant steam used heat.
Description of drawings
By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.
Fig. 1 is the overall structure schematic diagram of the utility model embodiment brown coal drying coal burning system.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail, so that technical staff's of the same trade understanding:
As shown in Figure 1, label is represented respectively: the 1-deduster; The 2-heat-energy recovering apparatus; The 3-medium-speed pulverizer; The 4-mill separator; The 5-pulverized coal distributor; The 6-coal burner; The 7-boiler; The 8-air preheater; The 9-pressure fan; 10-secondary air channel road; The 11-steam turbine; 12-secondary wind bellows; The 13-seal fan; The 14-drying tube; 15-first steam-heating pipe; The 16-coal collector; 17-lacks the gas blower fan; 18-is weary, and retracting device is coagulated in air cooling; The 19-raw coal takes off the sodium device; 20-second steam-heating pipe; 21-warm water pipeline; The 22-separator; The 23-unit for treating water; The 24-drainage pump; The 25-chemical plant; The 26-cold water pipes; 27-fails device for coal; The 28-air-introduced machine; The 29-desulfurizing tower; 30-lacks the gas cooler.
Provide a kind of high sodium coal to take off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system in the present embodiment, the principle of this electricity generation system as shown in Figure 1.The main body design of its design is by taking off sodium component high sodium coal to be taken off the sodium processing in the stokehold, wear into coal dust afterwards, again breeze airflow is carried out gas solid separation, separate the back coal dust and send into the stove internal combustion by warm wind, and the weary gas of high-moisture enters and takes off sodium component and fully reclaim heat energy and moisture, and the steam turbine steam used heat of electricity generation system is dry and take off the heat energy source of sodium component as coal dust.Below will form for the system of cycle generating system and be described in detail:
In the part of stokehold, defeated device for coal 27 connects drying tube 14.Drying tube 14 has coal feed point, coal outlet, high-temperature flue gas entry and exhaust outlet, and wherein, the fluid bed in this high-temperature flue gas entry and the drying tube 14 is communicated with, and coal feed point is connected to and fails on the device for coal 27, and coal outlet connects the coal feed point of medium-speed pulverizer 3 again.The outlet of medium-speed pulverizer 3 arranges mill separator 4, mill separator 4 connects pulverized coal distributor 5 by the powder process pipeline, pulverized coal distributor 5 is by the coal burner 6 on the powder feeding pipes connection boiler 7, in addition, the exhaust outlet of drying tube 14 connects coal collector 16, and the meal outlet of this coal collector 16 connects the coal feed point of described medium-speed pulverizer 3.The weary gas outlet of coal collector 16 connects weary gas blower fan 17, and the outlet of weary gas blower fan 17 is divided into two-way, one tunnel primary side air inlet that is communicated with described weary gas cooler 30 wherein, and another road and described drying tube 14 interior fluid beds are communicated with.
Weary gas cooler 30 has cold water inlet, cooling water outlet, weary gas entrance, weary gas outlet and condensation-water drain, weary gas is entered in its primary side by weary gas entrance, be cooled the back by weary gas outlet discharge, and the water that condenses in the cooling procedure is discharged by condensation-water drain, cold water as refrigerant is entered by cold water inlet in the secondary side of weary gas cooler 30, and the heat in the weary gas of recovery is also done him through the cooling water outlet discharge and used.
Be provided with air preheater 8 in the flue of boiler 7, the air inlet of this air preheater 8 connects pressure fan 9, this pressure fan 9 is positioned at outside the flue of boiler 7, cool ambient air is sent in the air preheater 8 by pressure fan 9, send into secondary air channel road 10 after being heated, the output in this secondary air channel road 10 is by a minute two-way, wherein leads up to 12 superchargings of secondary wind bellows, sends in the coal burner 6; The air inlet of medium-speed pulverizer 3 bottoms is sent on another road.Seal fan 13 is connected on the sealing air port of medium-speed pulverizer 3.The hot cigarette process air-introduced machine 28 that smoke duster 1 is discharged is discharged to desulfurizing tower 29.
Raw coal takes off in the sodium system, and retracting device 18 is coagulated in the weary air cooling that is communicated with, raw coal takes off sodium device 19, separator 22, heat-energy recovering apparatus 2 and unit for treating water 23 and constitutes by being connected in series successively.Wherein:
The effect that retracting device 18 is coagulated in weary air cooling has two, and one is the heat that fully reclaims weary gas, and another is the moisture that fully reclaims in the weary gas.In the present embodiment, two kinds of above-mentioned energy recovery realize by the spray cooling, the spray chamber that retracting device 18 has sealing is coagulated in weary air cooling, form cold water inlet on this spray chamber, warm water outlet and the air inlet that is communicated with the weary gas outlet of weary gas cooler 30, and be provided with the shower nozzle that is communicated with described cold water inlet in this spray chamber, the cold water that is entered by cold water inlet sprays in the spray chamber uniformly through shower nozzle, and the water smoke that is sprayed by the weary gas that air inlet enters is reduced to below the water dew point, so that moisture is fully extracted, and by warm water outlet outflow,, after being cooled and water reclaims, discharged by gas vent and to be sent to desulfurizing tower 29 by weary gas.
Raw coal takes off sodium device 19 and is used for the high sodium raw coal of washing, has for the high sodium raw coal in the washing access to plant, makes alkali metal washing soluble in water chamber in the high sodium raw coal and second steam-heating pipe 20 that is used for heating.The entrance of second steam-heating pipe 20 is communicated with pump-line, and next circulation is carried out in its outlet in condensate system is sent back to boiler 7.Described washing chamber has water inlet, high sodium raw coal charging aperture and discharging opening, wherein the warm water outlet of coagulating retracting device 18 by warm water pipeline 21 and described weary air cooling of this water inlet is communicated with, high sodium raw coal charging aperture is used for sending into raw coal in the washing chamber, and is discharged by discharging opening by the product after the washing (taking off sodium coal and the waste water that is dissolved with alkali metal).
Heat-energy recovering apparatus 2 is used for reclaiming the heat energy of waste water, and the primary side entrance of heat-energy recovering apparatus 2 is connected with the wastewater outlet of separator 22, and its side outlet is communicated to unit for treating water 23.And the path of formation cooling matchmaker circulation in the secondary side of heat-energy recovering apparatus 2.
Unit for treating water 23 is used for metallic elements such as waste water sodium potassium are separated, it has circulating water outlet and sodium potassium concentrated solution outlet, sodium potassium concentrated solution outlet is discharged sodium potassium concentrate, circulating water outlet then is admitted in the cold water pipes 26, and is pumped to weary air cooling through drainage pump 24 and coagulates retracting device 18 and recycle.The sodium potassium concentrate of discharging in the sodium potassium concentrated solution outlet can be sent in the chemical plant 25, reclaims to be used for alkali processed and potash fertilizer production.
More than be exactly that high sodium coal of the present utility model takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, its concrete working method is as follows:
Being coagulated retracting device 18 heating warm water by weary air cooling delivers into raw coal via warm water pipeline 21 and takes off in the sodium device 19, the while raw coal also is transported into raw coal and takes off in the sodium device 19, under uniform temperature and pressure, wash in wash solution by certain hour, be subjected under the double action of temperature and wash solution, can destroy the balance of former texture of coal, make water and alkali metal in raw coal crystalline solid and surface and the pore that migration and dissolving take place rapidly, make a large amount of alkali metals in the raw coal comprise sodium, potassium, mercury, sulphur, ashes etc. migrate in a large number or are dissolved in the wash solution, to reach the purification to raw coal.For the effect that ash takes off sodium is washed in raising, raw coal takes off to be kept in the sodium device 19 certain temperature and the raw coal time of staying.Raw coal takes off sodium device 19 and keeps the required thermal source of uniform temperature all from the steam of the extraction opening of steam turbine 11, and steam takes off in the sodium device 19 cooling and condensation heat at raw coal and becomes hydrophobicly, and hydrophobic being sent back to by drainage pump, condensate system carried out next circulation in the boiler.
The sodium coal that takes off by separator 22 output is sent into drying tube 14 through defeated device for coal 27, and the steam by steam turbine 11 heats, to improve dry mass.Because the temperature in the drying tube 14 will be taken off sodium device 19 far above raw coal, therefore, for taking full advantage of the heat from the steam of steam turbine 11, steam is carried and is taken off sodium device 19 to raw coal after lowering the temperature through drying tube 14.
Raw coal is descending finish preliminarily dried in drying tube 14 after.Most of coal grain enters medium-speed pulverizer 3 by drying device 14 bottoms, and raw coal is fractured into coal dust in medium-speed pulverizer 3.Sealing air port on the medium-speed pulverizer 3 continues to send into new wind by seal fan 13, make it send wind powder mixture, these wind powder mixtures enter the mill separator 4 that medium-speed pulverizer 3 outlets are arranged, mill separator 4 is sent thick pulverized coal particle back to medium-speed pulverizer 3 and is continued to grind, and qualified coal dust is sent to burner 6 by pulverized coal distributor 5 by powder feeding pipes.
Simultaneously, the weary gas of heated high temperature in the drying tube 14 is carrying fine powder and is being lacked the exhaust outlet extraction of gas blower fan 17 by drying tube 14, enter in the coal collector 7 and reclaim fine powder, the fine powder that coal collector 7 reclaims is sent back in the medium-speed pulverizer 3, weary gas after the purification is divided into two-way, wherein one the tunnel return drying tube 14 and by fluid bed with take off the sodium coal and mix, heat for taking off the sodium coal, another road enters weary gas cooler 30.Weary gas cool off to reclaim heat energy weary gas cooler 30 in, the while also obtains a large amount of condensate water, both can have been carried out after the water treatment also can directly being discharged into the desulphurization system wastewater disposal basin by power plant's reuse by the low-temperature condensate that lacks 30 discharges of gas cooler.Entering weary air cooling by the weary gas that lacks 30 discharges of gas cooler as temperature control medium coagulates in the retracting device 18, spray through shower nozzle and reclaim recirculated water and the cold water carried unit 23 by water, weary gas is fully cooled off and be condensed into water, water in the weary gas is obtained a large amount of recovery, weary gas is after being cooled and water reclaims, and saturated wet flue gas is discharged by gas vent and is sent to desulfurizing tower 29 dischargings.
The utility model has proposed a kind of high sodium coal and has taken off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, has following characteristics:
1, high basic metal content is high raw coal is under certain raw coal diameter, under the effect of the wash solution of uniform temperature and pressure, destroyed the raw coal stability of structure, make the alkali metal in the raw coal that migration and dissolving take place, thereby reduced the sodium in the coal, ash, mercury, sulphur, etc. element, the quality technology that improves coal is simple, and security of operation is invested little;
2, raw coal is washed ash and is taken off and keep uniform temperature in the sodium device to be conducive to the alkali metal material water-soluble from coal, keep the required thermal source of uniform temperature from condense used heat and to weary gas tow taste heat of the steam of coal-burning power plant, realize utilizing used heat to wash ash thus and taken off sodium, had obvious energy-saving effect.
3, the required moisturizing of system both can also can utilize the water resource that reclaims from external water source from raw coal, by reclaiming for the moisture in the weary gas, at last by reduce temperature to below the water dew point so that moisture is fully extracted.
4, system's output takes off the sodium coal by behind the drying and upgrading, having become the clean coal of high-quality can be directly used in as industrial chemicals or for coal-fired powder generating set, fire coking and heating surface contamination problem in the stove that high sodium coal power generation unit faces and improved alkali-metal etching problem to boiler body thereby significantly improve or solved at all, solved the sodium vapor separation problem in the Coal Chemical Industry gasification simultaneously.
5, the liquid after coal liquid separates enters wastewater treatment equipment, and isolated sodium potassium concentrate is recyclable for alkali processed and potash fertilizer production.
6, will lack the water resource that can reclaim in a large number after the air cooling but in the coal, and can be used as system water supplement.
7, the coal after purifying is carried out drying and handle, the moisture content that removes in the coal improves the quality of coal greatly.
Therefore, take off high sodium coal of the present utility model sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system have realized the alkali metal content in the high sodium coal of effective reduction, the advantage that have that technology is simple, security of operation, investment are little, can fully effectively utilize coal fired power plant steam used heat.
The utility model one of ordinary skill in the art be appreciated that; the above embodiment of the utility model only is one of preferred embodiment of the present utility model; be the length restriction; here can not all embodiments of particularize; any enforcement that can embody the utility model claim technical scheme is all in protection domain of the present utility model.
It should be noted that; above content is to further describing that the utility model is done in conjunction with concrete embodiment; can not assert that the specific embodiment of the present utility model only limits to this; under the guidance of above-described embodiment; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion drop in the protection domain of the present utility model.
Claims (6)
1. one kind high sodium coal takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, comprises boiler and steam turbine, it is characterized in that described electricity generation system also comprises:
The front-furnace feeding system comprises being connected in series drying tube, coal pulverizer and the pulverized coal distributor that is communicated with successively, also comprises coal collector and weary gas cooler; Described pulverized coal distributor is communicated with the burner of described boiler; The entrance of the air preheater in the described boiler flue connects pressure fan, and its outlet is divided into two-way, and one the tunnel connects described burner, and another road connects the air inlet of described coal pulverizer bottom; The weary gas import of described coal collector is communicated with the exhaust outlet of described drying tube, the meal outlet of this coal collector connects the coal feed point of described coal pulverizer, the weary gas outlet of this coal collector connects weary gas blower fan, the outlet of described weary gas blower fan is divided into two-way, one tunnel primary side air inlet that is communicated with described weary gas cooler wherein, another road is communicated with fluid bed in the described drying tube; Also be provided with first steam-heating pipe that takes off the sodium coal for drying in the described drying tube, the import of this first steam-heating pipe is connected to described turbine bleed point; Form the refrigerant flowing space in the secondary side of described weary gas cooler;
Raw coal takes off sodium system, comprise for the weary air cooling of reclaiming weary gas moisture and heat and coagulate retracting device, the raw coal that is used for the high sodium raw coal of washing takes off the sodium device, being used for will be from described raw coal taking off of taking off that the sodium device the comes out moisture content of coal that the sodium coal separates with the waste water that is dissolved with alkali metal from device, and is used for wastewater treatment equipment that the waste water after the separation is handled; The air inlet that retracting device is coagulated in described weary air cooling is communicated with the exhaust outlet of described coal collector, and its warm water outlet is taken off the sodium device with described raw coal and is communicated with; Described raw coal takes off the sodium device and is provided with for second steam-heating pipe that heats coal-water mixture, and the import of described second steam-heating pipe is connected to the outlet of first steam-heating pipe, and the outlet of described second steam-heating pipe is connected to described boiler through coagulating the water device; Described moisture content of coal connects described drying tube from the coal outlet of device by defeated device for coal; Described wastewater treatment equipment has circulating water outlet and sodium potassium concentrated solution outlet, and described circulating water outlet is connected to the cold water inlet that retracting device is coagulated in described weary air cooling.
2. a kind of high sodium coal according to claim 1 takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, it is characterized in that: the spray chamber that retracting device has sealing is coagulated in described weary air cooling, and this spray chamber is provided with the shower nozzle that is communicated with described cold water inlet at least.
3. a kind of high sodium coal according to claim 1 takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, it is characterized in that: the cold weary gas outlet that retracting device is coagulated in described weary air cooling is connected to desulfurizing tower.
4. a kind of high sodium coal according to claim 1 takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, and it is characterized in that: the outlet of described coal pulverizer arranges mill separator.
5. a kind of high sodium coal according to claim 4 takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, and it is characterized in that: described coal pulverizer is medium-speed pulverizer.
6. a kind of high sodium coal according to claim 1 takes off sodium and weary air-flow medium-speed pulverizer blowing powder producing electricity generation system, it is characterized in that: described raw coal takes off sodium system and also comprises heat-energy recovering apparatus, the primary side entrance of this heat-energy recovering apparatus is communicated with the wastewater outlet of described moisture content of coal from device, its side outlet is communicated with described wastewater treatment equipment, forms the refrigerant flow path in its secondary side.
Priority Applications (1)
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| CN 201320124790 CN203116062U (en) | 2013-03-18 | 2013-03-18 | Rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization |
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| CN 201320124790 CN203116062U (en) | 2013-03-18 | 2013-03-18 | Rapid-milling direct-blowing type powder-processing power generation system in high sodium coal sodium-removal and gas exhausting fluidization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713113A (en) * | 2015-01-27 | 2015-06-17 | 华北电力大学 | High sodium coal sodium-free upgrading fire coal power generation system integrating solar energy and waste-heat utilization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713113A (en) * | 2015-01-27 | 2015-06-17 | 华北电力大学 | High sodium coal sodium-free upgrading fire coal power generation system integrating solar energy and waste-heat utilization |
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