CN103148495B - High sodium coal takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system - Google Patents
High sodium coal takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system Download PDFInfo
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- CN103148495B CN103148495B CN201310087016.6A CN201310087016A CN103148495B CN 103148495 B CN103148495 B CN 103148495B CN 201310087016 A CN201310087016 A CN 201310087016A CN 103148495 B CN103148495 B CN 103148495B
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Abstract
The present invention relates to a kind of high sodium coal and take off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system.This system at least comprise be connected in series connection successively drying tube, coal pulverizer, coal dust classifier, coal collector, fine coal storehouse, air and powder mixer and boiler, also comprise mixing chamber, steam turbine, and the weary gas waste-heat recovery device connected in turn, weary gas condensate recycling device, raw coal take off sodium device, separator and unit for treating water.Its advantage is: reduce the alkali metal content in raw coal, thus significantly improve or fundamentally solve the problems such as the combustion slagging that faces of high sodium coal power generation unit and heating surface stains, corrosion, effectively be applicable to accurate eastern coal and other purification upgrading process containing high, the moisture high colm of sodium, have that technique is simple, security of operation, investment are little, energy-saving and environmental protection, there is the advantage of recycling economy, both may be used for the supply of high-quality Filter Tuber For Clean Coal, may be used for again firing high sodium coalpit mouth generating set, also realize joint production of coal and electricity.
Description
Technical field
The invention belongs to coal power generation technical field, relate to high sodium coal power generation technology, say with having, relate to a kind of high sodium coal and take off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system.
Background technology
High sodium coal refers to the special coal of a class that in coal, alkali metal compound composition is higher.In all kinds of alkali metal compound, generally in the majority with sodium compound, therefore be referred to as " high sodium coal ".At present, China's height sodium coal mainly concentrates on the coalfield, standard east of Junggar Basin, Xinjiang, china east, and accurate eastern coalfield resources reserves reach 3,900 hundred million tons, and adding up at present to verify coal resources reserves is 2,136 hundred million tons, coalfield coal-forming area 1.4 ten thousand square kilometres is the current maximum self-contained coalfield of China.Calculate with present coal in China annual production, an eastern coalfield of standard just can use 100 years in the whole nation.Because resources reserve is abundant and 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 Filter Tuber For 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 the raw material being used for doing Coal Chemical Industry, be all the lustration raw material of low stain, low emission, can effectively save treatment of wastes produced expense.Good material base has been laid in be all the as the criterion coal electricity in area, east 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 electricity Dong send " topmost energy safeguard base.
On the whole, the ature of coal in area, accurate east has following characteristics: higher moisture; Medium calorific capacity; Easily catch fire, easy to burn out; Strong coking; High basic metal content, strong contamination.At present, strong coking and strong contamination propose huge challenge to the design and operation firing accurate eastern coal utility boiler, the result of trial operation of small-load generators shows, during full combustion accurate eastern coal, boiler slagging and heating surface contamination problems are very serious, and boiler cannot longtime running.Trace it to its cause, these problems are all higher closely related with alkali metal content in coal ash.
At present, each electricity power enterprise of China builds power plant in area, standard east, and carry out mixing burning after the standard of 20-30% east coal can only be utilized to mix with other coal, the eastern coal use amount of aligning is very limited like this, simultaneously coal-fired from other local purchase high-quality again, add the cost of electricity-generating of electricity power enterprise.The construction of the exploitation and power supply base of aiming at eastern coalfield brings difficulty, is therefore difficult to the advantage of eastern for standard coal to be given full play to.
In order to utilize accurate eastern high sodium coal, for the another kind that generates electricity, other mixes burning way: as adopted the silicon of blending one fixed number or alundum (Al2O3) etc., the ash fusion point of stove combustion can be adjusted, accurate eastern high sodium coal can be adopted to burn in the boiler more, also certain contamination of improvement boiler and the problem of slagging scorification can be played, but add the effect of attrition boiler service life of boiler and reduce coal-fired calorific capacity, this makes the operating cost that must increase construction investment and power plant again simultaneously.
Therefore, how to reduce the alkali metal content in accurate eastern coal, Anti-slagging, contamination and corrosion, guarantee safe and economical boiler operation over a long time, being electricity power enterprise and the unavoidable problem of other industry using accurate eastern coal, is also the significant challenge that the accurate eastern coal-electricity base construction 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 milling pulverization system at the pulverized coal preparation system of the large-sized boiler for higher moisture coal.Be by brown coal drying in this pulverized coal preparation system, the water evaporation in brown coal become weary gas, then grinds brown coal and become coal dust, send coal dust and weary gas to hearth combustion in the lump simultaneously, then will enter in the lump in air with chimney.Because the weary gas of high-moisture is admitted to burner hearth, inner flue gas of the stove amount is increased, and reduces fire box temperature.
For above-mentioned deficiency, before the applicant, once applied for that Shen Authorization Notice No. was the Chinese patent of CN202229208U, " a kind of stove cigarette drying and Water Sproading warehouse formula fan mill pulverized coal carried by hot air pulverized coal preparation system ".This system comprises boiler, is connected in series the run coal bin of connection, descending drying tube, blower mill, mill separator successively, pulverized coal distributor, described coal dust classifier is communicated with the burner of boiler again, also comprise mixing chamber, this mixing chamber first air inlet and the 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 descending drying tube again, described boiler flue is other is provided with pressure fan, this pressure fan is communicated with the air preheater be located in flue, it is characterized in that: between described mill separator and pulverized coal distributor, be also provided with weary gas separating device successively, fine coal storehouse, machine supplying powder and coal, pulverulent fuel mixer, described weary gas separating device top has the outlet of weary gas, the weary air filter of this weary gas outlet, the coal outlet of described weary air filter is communicated with fine coal storehouse again, the gas outlet of weary gas separating device is communicated with a weary gas blower fan, this weary gas blower fan is communicated with desulfurizing tower again, described air preheater is also communicated with coal, pulverulent fuel mixer.
By such setting, because the weary gas of steam that includes produced together does not enter burner hearth in company with dried brown coal, in-furnace temperature can be made to raise, contribute to improving fuel economy, the heating surface area of boiler can be reduced, can obviously lower boiler volume and manufacturing cost.In addition, this system high-temperature flue gas and cold smoke very low as its oxygen content of drier, doing so avoids the generation of brown coal deflagration accident having in dry shattering process.In addition, dried brown coal are sent into burner by the present invention's hot blast, suitably can improve the outlet temperature after coal pulverizer on the one hand, significantly can improve the flammability of fuel like this, boiler low load stable combustion performance enhancement, has enough hot-airs when ensureing boiler combustion on the other hand.
But do not fully take into account the de-sodium process of high sodium coal in said structure, and how to utilize the heat energy and moisture that contain in weary gas, the energy recovery of weary gas and Water Sproading deficiency, cause a large amount of heat energy and water resource to be wasted.
Summary of the invention
The object of the embodiment of the present invention is the deficiency for technology in prior art, propose a kind of high sodium coal and take off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, mainly solve de-sodium in higher moisture height sodium coal power generation technology and weary gas energy recovery and Water Sproading problem, the heat energy simultaneously reclaimed may be used for de-sodium process, has benefit that is energy-conservation, that fall this, improve economy.
In order to reach foregoing invention object, the high sodium coal of one that the present invention proposes takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, is achieved through the following technical solutions:
A kind of high sodium coal takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, described cycle generating system at least comprise be connected in series connection successively drying tube, coal pulverizer, coal dust classifier, coal collector, fine coal storehouse, air and powder mixer and boiler, also comprise mixing chamber and be connected to the steam turbine of described boiler; The gas outlet of described mixing chamber is communicated with described drying tube, and the flue gas that the air inlet of described mixing chamber is communicated with described boiler takes out mouth, and the air inlet of described coal pulverizer is communicated with described smoke duster via booster fan; It is characterized in that, described cycle generating system also comprises:
For water at low temperature being generated the weary gas condensate recycling device of high-temperature water, there is closed spray chamber, the air inlet this spray chamber being formed cold water inlet, warm water outlet and be communicated with described coal collector exhaust outlet, and in this spray chamber, be provided with the shower nozzle be communicated with described cold water inlet;
Raw coal for washing high sodium raw coal takes off sodium device, has high sodium raw coal charging aperture, discharging opening and the water inlet with described warm water outlet, is also provided with the steam-heating pipe for heating coal-water mixture and washing chamber; The extraction opening of steam turbine described in the inlet communication of described steam-heating pipe, the outlet of described steam-heating pipe is connected to described boiler through drainage pump;
For the coal-water separating device carrying out being separated from described discharging opening de-sodium coal out and the waste water being dissolved with alkali metal, the coal outlet of described coal-water separating device connects described drying tube by defeated device for coal.
Weary gas waste-heat recovery device is also provided with between described coal collector and described weary gas condensate recycling device, the entrance of the primary side of described weary gas waste-heat recovery device is communicated with described coal collector by blower fan, primary side outlet is communicated with described weary gas condensate recycling device, forms refrigerant flow path in the secondary side of described weary gas waste-heat recovery device.
Described cycle generating system 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 coal-water separating device, forms refrigerant flow path in its secondary side.
Described cycle generating system also comprises the wastewater treatment equipment for processing the described waste water after separation, described wastewater treatment equipment has waterwater entrance, circulating water outlet and sodium potassium concentrated solution outlet, the primary side outlet of described waterwater entrance and described heat-energy recovering apparatus, described circulating water outlet is connected to the cold water inlet of described weary gas condensate recycling device.
Also air preheater is provided with in described boiler, the air inlet of described air preheater is in communication with the outside by pressure fan, the air outlet of described air preheater is communicated with the coal burner of described boiler by secondary air bellow, and is communicated with described air and powder mixer by booster fan.
Described mixing chamber has the first air inlet taken out mouth with the hot cigarette in described boiler flue and be communicated with, and takes out with the cold smoke in described boiler flue the second air inlet that mouth is communicated with.
A kind of high sodium coal proposed by the invention takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, has following characteristics:
1, by raw coal high for high basic metal content under certain raw coal diameter, under the effect of the wash solution of uniform temperature and pressure, destroy the stability of raw coal structure, the alkali metal in raw coal is made migration to occur and dissolve, thus reduce sodium in coal, ash, mercury, sulphur, etc. element, the quality technique improving coal is simple, and security of operation, invests little;
2, raw coal is washed in the de-sodium device of ash and is maintained uniform temperature to be conducive to alkali species water-soluble from coal, the thermal source of maintenance needed for uniform temperature is from the steam condensation used heat of coal-burning power plant and to weary gas tow taste heat, thus achieve and utilize used heat to wash the de-sodium of ash, there is significant energy-saving effect.
3, moisturizing needed for system both from external water source, also can utilize the water resource reclaimed from raw coal, by reclaiming for the moisture in weary gas, finally by reducing below temperature to water dew point fully to be extracted by moisture.
4, after the de-sodium coal that system exports passes through drying and upgrading, becoming high-quality Filter Tuber For Clean Coal can be directly used in as industrial chemicals or for burning coal powder generating set, thus the alkali-metal etching problem significantly improving or solve the combustion slagging that faces of high sodium coal power generation unit and heating surface contamination problems at all and improve boiler body, solve the sodium vapor separation problem in Coal Chemical Industry gasification simultaneously.
5, the liquid after the separation of coal liquid enters wastewater treatment equipment, and isolated sodium potassium concentrate is recyclable to be produced for alkaline and potash fertilizer.
The water resource that 6, will can reclaim in a large number after weary air cooling but in coal, and can be used as system water supplement.
7, carry out high temperature flue gas drying process to the coal after purification, the moisture content removed in coal makes the quality of coal greatly improve.
Therefore, high sodium coal of the present invention takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system and achieves the alkali metal content effectively reduced in high sodium coal, the advantage that have that technique is simple, security of operation, investment are little, fully effectively can utilize coal fired power plant steam used heat.
Accompanying drawing explanation
By the description carried out its exemplary embodiment below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the present invention will become apparent and easy understand.
Fig. 1 is the overall structure schematic diagram of embodiment of the present invention brown coal drying coal burning system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, so that the understanding of technical staff of the same trade:
As shown in Figure 1, label represents respectively: 1-desulfurizing tower; 2-heat-energy recovering apparatus; The descending drying tube of 3-; 4-blower mill; 5-coal dust classifier; 6-powder process pipeline; 7-coal collector; 8-fine coal storehouse; The weary gas blower fan of 9-; 10-machine supplying powder; 11-air and powder mixer; 12-powder feeding pipes; 13-coal burner; 14-boiler; 15-is warm, and cigarette takes out mouth; 16-deduster; 17-air-introduced machine; 18-flue; 19-cold smoke blower fan; 20-cold smoke pipeline; 21-mixing chamber; 22-high-temperature furnace smoke pipeline; 23-pressure fan; 24-blast pipe road; The weary gas waste-heat recovery device of 25-; The weary gas condensate recycling device of 26-; 27-shower nozzle; 28-cold water pipes; 29-raw coal takes off sodium device; 30-drainage pump; 31-warm water pipe; 32-separator; 33-unit for treating water; 34-chemical plant; The defeated device for coal of 35-; 36-steam turbine; 37-drain water piping; 38-pump-line; 39-boiler main jet chimney; 40-condenser; 41-condensate pump; 42-feed pump; 43-cold smoke takes out mouth; 44-air preheater; 45-Secondary Air pipeline; 46-secondary air bellow; 47-booster fan.
There is provided a kind of high sodium coal to take off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system in the present embodiment, this system principle as shown in Figure 1.The main body design of its design carries out de-sodium process by de-sodium component to high sodium coal in stokehold, wear into coal dust afterwards, again gas solid separation is carried out to breeze airflow, after being separated, coal dust sends into stove combustion by warm air, and the weary gas of high-moisture enters de-sodium component fully reclaims heat energy and moisture, meanwhile, the steam-turbine used heat of electricity generation system is equally as the heat energy source of de-sodium component.Below the system composition for cycle generating system is described in detail:
In the part of stokehold, defeated device for coal 35 connects descending drying tube 3, and descending drying tube 3 connects blower mill 4 again, and blower mill 4 connects coal dust classifier 5 again, coal dust classifier 5 connects coal collector 7 by powder process pipeline 6, and coal collector 7 is communicated with fine coal storehouse 8 again.The top of coal collector 7 has the outlet of weary gas.Fine coal storehouse 8 is communicated with air and powder mixer 11 by machine supplying powder 10, and air and powder mixer 11 is communicated with the coal burner 13 on boiler 14 by powder feeding pipes 12.
The upper furnace of boiler 14 has hot cigarette and takes out mouth 15, and the rear portion of burner hearth has cold smoke and takes out mouth 43, and hot cigarette takes out the first air inlet that mouth 15 is communicated to mixing chamber 21, and cold smoke takes out the second air inlet that mouth 43 is communicated to mixing chamber 21.The flue afterbody of boiler 14 is also provided with deduster 16, and this deduster 16 is communicated to flue 18 by air-introduced machine 17, and the output of this flue 18 is by a point two-way, and wherein a road is communicated to desulfurizing tower 1, and is discharged into the external world; Another road is communicated with a cold smoke blower fan 19, and this cold smoke blower fan 19 is communicated in blower mill 4 by cold smoke pipeline 20 again.
Air preheater 44 is set in the flue of boiler 14.Cool ambient air is sent in air preheater 44 by pressure fan 23, is heated rear feeding Secondary Air pipeline 45, and the output of this Secondary Air pipeline 45, by a point two-way, wherein leads up to secondary air bellow 46 supercharging, sends in coal burner 13; Separately lead up to booster fan 47 supercharging, send in air and powder mixer 11.
The gas outlet of mixing chamber 21 is communicated in descending drying tube 3 by high-temperature furnace smoke pipeline 22.
Boiler 14 accesses in steam turbine 36 by boiler main jet chimney 39, the power conversion of steam is become mechanical power by steam turbine 36, steam after being utilized is divided into two-way, one tunnel is sent into raw coal via bleeding point, pump-line 38 and is taken off in sodium device 29, separately leading up to condenser 40, condensate pump 41 enters in feed pump 42, and is sent back in boiler.
In addition, cycle generating system also comprises weary gas waste-heat recovery device 25, weary gas condensate recycling device 26, raw coal take off sodium device 29, separator 32, heat-energy recovering apparatus 2 and unit for treating water 33.Wherein:
Weary gas waste-heat recovery device 25 is equivalent to one and heat in weary gas is delivered to the heat exchanger in refrigerant, weary gas flows in the primary side of weary gas waste-heat recovery device 25, and refrigerant flows in the secondary side of weary gas waste-heat recovery device 25, by this heat is passed in refrigerant.Wherein, the entrance of the primary side of weary gas waste-heat recovery device 25 is communicated with described coal collector by blower fan, and primary side outlet is communicated with blast pipe road 24, in the weary gas condensate recycling device 26 of primary side outlet access.
The effect of weary gas condensate recycling device 26 has two, and one is the heat fully reclaiming weary gas, and another is the moisture fully reclaimed in weary gas.In the present embodiment, two kinds of above-mentioned energy recovery are realized by spraying cooling, weary gas condensate recycling device 26 has closed spray chamber, this spray chamber forms cold water inlet, warm water outlet and the air inlet with weary gas waste-heat recovery device 25 primary side outlet, and in this spray chamber, be provided with the shower nozzle 27 be communicated with described cold water inlet, the cold water entered by cold water inlet sprays in spray chamber through shower nozzle 27 uniformly, and the weary gas entered by air inlet is reduced to below water dew point by the water smoke sprayed, so that moisture is fully extracted, and export outflow by warm water, by weary gas after cooled and Water Sproading, there is gas vent to discharge and be sent to desulfurizing tower 1.
Raw coal takes off sodium device 29 for washing high sodium raw coal, has the high sodium raw coal for washing in access to plant, makes the washing chamber soluble in water of the alkali metal in high sodium raw coal, and the steam-heating pipe for heating.The entrance of steam-heating pipe is communicated with pump-line 38, and its outlet is sent to feed pump 42 place through drainage pump 30, drain water piping 37, and carries out next circulation by feed pump 42 together with being sent back in boiler by condenser 40 solidifying water out.Described washing chamber has water inlet, high sodium raw coal charging aperture and discharging opening.Raw coal takes off sodium device 29 water inlet by the warm water outlet of warm water pipe 31 with described weary gas condensate recycling device 26, high sodium raw coal charging aperture is used for sending into raw coal in washing chamber, and is discharged by discharging opening by the product (de-sodium coal and the waste water being dissolved with alkali metal) after washing.
Separator 32 is for being separated taking off sodium device 29 de-sodium coal out from raw coal with the waste water being dissolved with alkali metal, and it has de-sodium coal export and wastewater outlet.De-sodium coal export is used for excluding de-sodium coal, de-sodium coal sends into drying tube 3 by defeated device for coal 27, not only realize joint production of coal and electricity, and due to de-sodium coal from raw coal take off sodium device 29 out time carry a large amount of heats, enter drying tube 3 timely and can effectively reduce dry institute calorific requirement, improve drying effect.In addition, de-sodium coal also can be used as sale coal, thus improves coal price and expand sales range.Wastewater outlet then connects heat-energy recovering apparatus 2.
Heat-energy recovering apparatus 2 is for reclaiming the heat energy in waste water, and the primary side entrance of heat-energy recovering apparatus 2 is connected with the wastewater outlet of separator 32, and its side outlet is communicated to unit for treating water 33.And the path formed in the secondary side of heat-energy recovering apparatus 2 for refrigerant circulation.
Unit for treating water 33 is for being separated metallic elements such as sodium potassium in waste water, it has circulating water outlet and sodium potassium concentrated solution outlet, sodium potassium concentrated solution outlet discharges sodium potassium concentrate, and circulating water outlet is then admitted in cold water pipes 28, and enters weary gas condensate recycling device 26 and recycle.The sodium potassium concentrate of discharging in sodium potassium concentrated solution outlet can be sent in chemical plant 34, reclaims and is used for alkaline and potash fertilizer production.
Be exactly more than that high sodium coal of the present invention takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, its specific works mode is as follows:
Heated warm water by weary gas condensate recycling device 26 to deliver into raw coal via warm water pipe 31 and take off in sodium device 29, simultaneously raw coal is also transported into raw coal and takes off in sodium device 29, under uniform temperature and pressure, washed in wash solution by certain hour, by under the double action of temperature and wash solution, the balance of raw coal structure can be destroyed, raw coal crystalline solid and the water in surface and pore and alkali metal is made migration to occur rapidly and dissolve, the a large amount of alkali metals in raw coal are made to comprise sodium, potassium, mercury, sulphur, ashes etc. migrate in a large number or are dissolved in wash solution, to reach the purification to raw coal.For improving the effect of washing the de-sodium of ash, raw coal takes off in sodium device 29 and maintains certain temperature and the raw coal time of staying.Raw coal takes off sodium device 29 and maintains thermal source needed for uniform temperature all from the steam of the extraction opening of steam turbine 36, steam takes off in sodium device 29 at raw coal also condensation heat of lowering the temperature and becomes hydrophobic, hydrophobicly be sent to feed pump 42 by drainage pump 30, and carry out next circulation by feed pump 42 together with being sent back in boiler by condenser 40 solidifying water out.
Separator 32 makes de-sodium coal be separated with waste water, the waste water carrying a large amount of heat energy enters heat-energy recovering apparatus 2 and reclaims heat energy, enter unit for treating water 33 afterwards to process, to reduce alkali metal ion content measured in water and to return the cold water inlet of weary gas condensate recycling device 26 as recirculated water.The sodium potassium concentrate that unit for treating water 33 is discharged then is recycled by recovery system.
The de-sodium coal exported by separator 32 sends into descending drying tube 3 through defeated device for coal 35, and the hypoxemia drier formed with by high-temperature flue gas mixes.High-temperature flue gas is taken out mouth 43 at the cold smoke that the hot cigarette on boiler furnace top takes out mouth 15 and boiler 14 afterbody and is extracted, and the two is mixed into the drier with certain just gentle flow at mixing chamber 21, drier is delivered to descending drying tube 3 by high-temperature furnace smoke pipeline 22.
Raw coal and above-mentioned high temperature drying agent mix and after completing preliminarily dried, enter blower mill 4 in descending drying tube 3.Raw coal is fractured into coal dust in blower mill 4, also dried dose of drying further simultaneously, the wind powder mixture that blower mill 4 is sent enters blower mill 4 and exports the coal dust classifier 5 arranged, coal dust classifier 5 is sent thick pulverized coal particle back to blower mill 4 and is continued to grind, and qualified coal dust and weary gas enter coal collector 7 and carries out gas solid separation.The isolated coal dust of coal collector 7 falls into fine coal storehouse 8 and sends into powder feeding pipes 12 via machine supplying powder 10 by air and powder mixer 11 again, is sent to burner 13.
The weary gas that the outlet of coal collector 7 weary gas exports is sent in weary gas waste-heat recovery device 25 by weary gas blower fan 9 via blast pipe road 24, and by the heating to refrigerant, weary gas is tentatively cooled.Cooled weary pneumatic transmission enters in weary gas condensate recycling device 26, and the recirculated water carried by Water Sproading unit 33 and cold water spray through shower nozzle 7, weary gas is made fully to cool and be condensed into water, water in weary gas is obtained a large amount of recovery, weary gas is after cooled and Water Sproading, and saturated wet flue gas is discharged by gas vent and is sent to desulfurizing tower 1 and discharges.
One of ordinary skill in the art of the present invention are appreciated that; the above embodiment of the present invention is only one of the preferred embodiments of the present invention; for length restriction; here can not all embodiments of particularize; any enforcement that can embody the claims in the present invention technical scheme, all in protection scope of the present invention.
It should be noted that; above content is in conjunction with concrete embodiment further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted 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 improve or distortion drops in protection scope of the present invention.
Claims (5)
1. one kind high sodium coal takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, described cycle generating system at least comprise be connected in series connection successively drying tube, coal pulverizer, coal dust classifier, coal collector, fine coal storehouse, air and powder mixer and boiler, also comprise mixing chamber and be connected to the steam turbine of described boiler; The gas outlet of described mixing chamber is communicated with described drying tube, and the flue gas that the air inlet of described mixing chamber is communicated with described boiler takes out mouth, and the air inlet of described coal pulverizer is communicated with described smoke duster via booster fan; Described cycle generating system also comprises:
For water at low temperature being generated the weary gas condensate recycling device of high-temperature water, there is closed spray chamber, the air inlet this spray chamber being formed cold water inlet, warm water outlet and be communicated with described coal collector exhaust outlet, and in this spray chamber, be provided with the shower nozzle be communicated with described cold water inlet;
Raw coal for washing high sodium raw coal takes off sodium device, has high sodium raw coal charging aperture, discharging opening and the water inlet with described warm water outlet, is also provided with the steam-heating pipe for heating coal-water mixture and washing chamber; The extraction opening of steam turbine described in the inlet communication of described steam-heating pipe, the outlet of described steam-heating pipe is connected to described boiler through drainage pump;
For the coal-water separating device carrying out being separated from described discharging opening de-sodium coal out and the waste water being dissolved with alkali metal, the coal outlet of described coal-water separating device connects described drying tube by defeated device for coal; It is characterized in that:
Weary gas waste-heat recovery device is also provided with between described coal collector and described weary gas condensate recycling device, the entrance of the primary side of described weary gas waste-heat recovery device is communicated with described coal collector by blower fan, primary side outlet is communicated with described weary gas condensate recycling device, forms refrigerant flow path in the secondary side of described weary gas waste-heat recovery device.
2. a kind of high sodium coal as claimed in claim 1 takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, it is characterized in that: described cycle generating system also comprises heat-energy recovering apparatus, the primary side entrance of this heat-energy recovering apparatus is communicated with the wastewater outlet of described coal-water separating device, forms refrigerant flow path in its secondary side.
3. a kind of high sodium coal as claimed in claim 2 takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, it is characterized in that: described cycle generating system also comprises the wastewater treatment equipment for processing the described waste water after separation, described wastewater treatment equipment has waterwater entrance, circulating water outlet and sodium potassium concentrated solution outlet, the primary side outlet of described waterwater entrance and described heat-energy recovering apparatus, described circulating water outlet is connected to the cold water inlet of described weary gas condensate recycling device.
4. a kind of high sodium coal as claimed in claim 3 takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, it is characterized in that: in described boiler, be also provided with air preheater, the air inlet of described air preheater is in communication with the outside by pressure fan, the air outlet of described air preheater is communicated with the coal burner of described boiler by secondary air bellow, and is communicated with described air and powder mixer by booster fan.
5. a kind of high sodium coal as claimed in claim 4 takes off sodium upgrading fan mill powder process and Water Sproading association circulating power generation system, it is characterized in that: described mixing chamber has the first air inlet taken out mouth with the hot cigarette in described boiler flue and be communicated with, and take out with the cold smoke in described boiler flue the second air inlet that mouth is communicated with.
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|---|---|---|---|---|
| CN103952164B (en) * | 2014-04-29 | 2016-01-20 | 华电电力科学研究院 | A kind of high sodium burning of coal gas-to electricity method |
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