CN201803574U - System for removing moisture in coal by flash evaporation method - Google Patents
System for removing moisture in coal by flash evaporation method Download PDFInfo
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- CN201803574U CN201803574U CN2010205370125U CN201020537012U CN201803574U CN 201803574 U CN201803574 U CN 201803574U CN 2010205370125 U CN2010205370125 U CN 2010205370125U CN 201020537012 U CN201020537012 U CN 201020537012U CN 201803574 U CN201803574 U CN 201803574U
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Abstract
The utility model relates to a system for removing moisture in coal by a flash evaporation method, which is mainly used for removing the moisture in the coal, and comprises a steam power accumulator, an air inlet header pipe, an exhaust manifold, at least two coal treatment tanks and at least one water storage tank, wherein the coal treatment tanks are respectively provided with an air inlet pipe, an exhaust pipe and a condensate water discharge pipe; the steam power accumulator is connected with the air inlet header pipe; the air inlet header pipe is respectively connected with the air inlet pipes; the exhaust manifold is respectively connected with the exhaust pipes; and the condensate water discharge pipe is connected with the water storage tank. The system is simple in structure, convenient for use and maintenance, high in energy utilization rate and good in water-saving effect of the system.
Description
Technical field:
The utility model relates to a kind of dewater unit, relates in particular to the device in a kind of coal dehydration technique field.
Background technology:
Energy-saving and emission-reduction, develop clean energy resource energetically and listed medium-term and long-term, the strategy of sustainable development of country in, under China's primary energy structure or the situation based on coal, brown coal exploitation, the technology of utilizing are subjected to the great attention of State Council and National Development and Reform Committee and have listed national clean energy resource developing goal in.Simultaneously, for the purpose of protection of resources, national energy committee takes to limit exploitation and bans use of fat coal to carry out the policy of coal chemical industry engineering the high-quality coal resource on ground such as Shanxi.
China is the country that takes the primary energy resource with coal as the leading factor, and coal can provide the primary energy more than 65%, and recoverable reserves occupies the third place in the world in the coal resources of China, accounts for 11.5% of world's gross reserves.But wherein about 12.7% reserves are brown coal, have verified about 2,000 hundred million tons of brown coal reserves, and lignite resource mainly is distributed in areas such as east Inner Mongolia, east, Yunnan, northeast, and also there are a small amount of reserves in south China.
According to statistics, about 26,229 hundred million tons of whole world brown coal reserves account for 24.4% of world's coal gross reserves, and enough used 30 years in the power station that is 1000MW for 2100 generating capacities.China has verified about 2,000 hundred million tons of brown coal reserves, accounts for 12.7% of national coal resources total amount, mainly is distributed in areas such as east Inner Mongolia, east, Yunnan, northeast, and also there are a small amount of reserves in south China.
Brown coal are that a kind of degree of metamorphism is lower, and the grizzle of the brownish black between peat and pitch coal is the higher again coal of volatile matter and inherent moisture, have to meet the easy weathering of air, the chance water characteristic of easy argillization again.Therefore will reduce moisture content, oxygen content, the raising calorific value realizes that extensive, efficient, the low pollution of brown coal is produced, remote transportation, makes the brown coal commercialization.
The brown coal of low-quality cheapness are fully transformed, the product that obtains after the upgrading is wide in variety, can improve its added value, improve the quality and the comprehensive utilization ratio of brown coal and enlarge application, improve the raw material mix of China's Chemical Manufacture, power industry and metallurgy industry, also solved the problem that environmental pollution was serious, heat utilization efficiency is low when brown coal directly burnt simultaneously.
Compare with bituminous coal, anthracite, the advantage of brown coal is that price is lower, the reactivity height, and ash content and sulfur content are low, but its calorific value is relatively low, and water content is higher, is generally 25～60%.Moisture in the brown coal increases cost of transportation, influences boiler operatiopn, reduces power plant efficiency, increases greenhouse gas emission, so the exploitation of brown coal drying and upgrading technology and equipment is cleaning and the key of effectively utilizing brown coal.
Generally adopt the predrying or steam drying process of flue gas that brown coal are carried out drying at present abroad, directly deliver near coal-mine power plant then and be used for combustion power generation.
With external different be, the near coal-mine power plant of China quantity is few, and most of power plant is away from the colliery.As the colliery that the used coal of a lot of power plant of the east China and the southeastern coastal areas is all transported from Shanxi, economize in Henan etc., promptly the Coal Transport radius is bigger.This development and utilization to lignite resource is had higher requirement.The brown coal moisture in area, China Inner Mongol is about 35%, and the brown coal moisture in area, Yunnan is more up to nearly 60%.Consider that from cost of transportation and combustion heat value aspect brown coal need just can be transported to power plant's burning after drying.Long-distance transportation high-moisture, low-calorie brown coal are non-remunerative economically.On the other hand, from the boiler combustion angle, burning high-moisture brown coal will cause flame temperature to reduce, and the thermal efficiency descends, the brown coal after power plant uses dehydration and upgrading, the phenomenon that can significantly reduce or avoid power plant's nominal output to reduce.
Tin alliance brown coal output in 2009 will reach 7,000 ten thousand tons, and processing digested 2,000 ten thousand tons in alliance, all the other coals all needed outward transport.The upgrading if 5,000 ten thousand tons of brown coal dewater can reduce by 1,000 ten thousand tons of freight volumes at least, can save railway freight 15～2,000,000,000 yuan (not comprising ocean freight).
Assessment was once done to the effect of brown coal dehydration back minimizing freight volume by the U.S., the brown coal of a kind of moisture 42.52%, caloric value 2847kcal/kg, after the steam treatment of 2.02Mpa, moisture reduces to 14.43%, caloric value is increased to 4315kcal/kg, is equivalent to improve calorific value 51.6%.On all 2,400,000 kilowatts of units of power plant 1 year approximately to if brown coal moisture can be reduced to about 16% by 36%, then can reduce by 2,200,000 tons of Coal Transport in 1 year with 1,100 ten thousand tons in brown coal, save 6,600 ten thousand yuan of freight charges.
In the prior art, adopt roller drying, tubulose drying, pneumatic conveying drying, fluidized bed drying, hot-blast stove drying, the ubiquity investment is big, the operating cost height, there is inflammable and explosive danger, therefore, is badly in need of providing a kind of security performance height, dewatering efficiency height, coal dewater unit that cost is low.
The utility model content:
One of the technical problems to be solved in the utility model is the deficiency that overcomes above-mentioned prior art, a kind of system of removing moisture in the coal with flash method is provided, it not only has simple in structure, and operation and maintenance is convenient, and energy utilization rate height, system water saving are effective.
A kind of system of removing moisture in the coal with flash method that provides according to the utility model, comprise the steam energy storage device, the inlet manifold, exhaust main, and at least three pressure volume pots, comprise a water tank and at least two coal process tanks in described three pressure volume pots, described coal process tank is respectively arranged with air inlet pipe, blast pipe and condensate draining pipe, described steam energy storage device is connected with the inlet manifold, described inlet manifold is connected respectively with described air inlet pipe, described exhaust main is connected respectively with described blast pipe, and described condensate draining pipe is connected with described water tank.
A kind of system with moisture in the flash method removal coal according to the utility model provides also has following attached technical characterictic:
Described exhaust main is connected by valve with described inlet manifold; Between described exhaust main and described inlet manifold, be provided with supplied gas pressurized vapor delivery pump, described exhaust main is connected with the low-pressure gas inlet of described steam delivery pump, and described steam carries delivery side of pump to be connected with described inlet manifold.When from a coal process tank during to another coal process tank exhaust, because both sides pressure reduction is bigger, do not need to start heat pump, when both sides pressure reduction in the steam discharge process is reduced to when be fit to starting the steam delivery pump, close the valve on this pipeline, start the steam delivery pump simultaneously, until reaching desired technological parameter.
Described steam delivery pump is the injecting type heat pump.The injecting type heat pump sprays the pressure and temperature raising of the high velocity air of generation with steam in the exhaust main by high steam (driving steam), thereby enters the inlet manifold once more, recycles, and reaches energy-conservation purpose.
Described water tank is provided with blast pipe, is connected with described exhaust main.
Be provided with discharge at described coal process tank top, described discharge is provided with the incoagulable gas blast pipe.
Described coal process tank is three.
Described coal process tank is four.
Described blast pipe, air inlet pipe, condensate draining pipe are provided with valve.
According to the system with moisture in the flash method removal coal that the utility model provides, overall structure is simple, and is cheap, alleviate according to the enterprise investment risk, simultaneously, fault rate is low, and user's use cost reduces, in addition, because saturated steam and flash steam steam are all recycled in the system, cause system to reduce the heat discharging, make the heat energy utilization rate of system maximize, promptly alleviated user's energy expenditure, reduced pollution again environment; Native system has good water-saving result, shows as: first is the direct recycling owing to steam, and condensed water wherein also is recuperable; Second portion is the circulating cooling system that does not need to be provided with separately in the conventional design, the use of having saved cooling water; Third part is the recycling of the water that flash distillation is come out from coal, causes system not only not need extraneous water supply, and can produce redundant moisture, and this part additional water is carried out cleaning, can be used as water resource and sells.
Description of drawings:
The schematic diagram with in the flash method removal coal system of moisture of Fig. 1 for providing according to the utility model.
The specific embodiment:
Referring to Fig. 1, comprise steam energy storage device 1 according to what the utility model provided, the inlet manifold 2, exhaust main 3, coal process tank 4A, 4B, with a water tank 5, coal process tank 4A, 4B is respectively arranged with air inlet pipe and blast pipe and condensate draining pipe, steam energy storage device 1 with advance house steward 2 and be connected, inlet manifold 2 and coal process tank 4A, the air inlet pipe of 4B connects respectively, exhaust main 3 and coal process tank 4A, the 4B blast pipe connects respectively, coal process tank 4A, the condensate draining pipe of 4B is connected with water tank 5, inlet manifold 2, coal process tank 4A, the blast pipe of 4B, air inlet pipe, be respectively arranged with valve on the condensate draining pipe, use for control operation.
Between exhaust main 3 and inlet manifold 2, be connected by valve, simultaneously, the pipeline in parallel with valve is provided with injecting type heat pump 6, the low-pressure gas inlet of exhaust main 3 and injecting type heat pump 6 is connected, and the outlet of injecting type heat pump 6 is connected with inlet manifold 2, and the nozzle of injecting type heat pump is connected with overheated steam pipe 7 from boiler, be used for and enter the inlet manifold again, periodic duty after the weary gas pressurization in the exhaust main.
The top of water tank 5 is provided with blast pipe, is connected with exhaust main 3.Because process steam decreases through using energy, except that using Boiler Steam replenishes, can also carry out flash distillation to the condensed water in the water tank 5, this part flash-off steam mixes with Boiler Steam and enters process tank after reaching the process steam parameter.On the connecting line between water tank 5 and the exhaust main, valve is arranged, when flash distillation is carried out in the exhaust steam in the process tank, this valve is closed, when the pressure in the process tank 5 has been reduced to required force value, close the valve on the process tank gas exhaust piping of exhaust condition, open the valve on the pipeline between water tank 5 and the exhaust main simultaneously, the condensed water in the water tank is carried out flash distillation.Not only can the required steam of replenishment system by the condensed water in the water tank being carried out flash distillation, also played effect to the condensed water cooling.
Be respectively arranged with discharge 8 at coal process tank 4A, 4B top, discharge 8 is provided with incoagulable gas blast pipe 9.
Coal process tank in the utility model is two or three or four, also can be a plurality of, in the above-described embodiments, what illustrate is two coal process tanks, in actual use, can be according to the diameter and the length of the coal processing capacity demand computing jar of different occasions, and the number of process tank.
Concrete operations are as follows:
Initial state is: process tank 4A needs the emptying decompression, and the coal in the process tank 4A is carried out flash distillation; And process tank 4B is for just installing coal, and closed a jar door, needs the air inlet pressurization; Closing process tank 4A then is connected with valve between the water tank; Close upward all valves between the gas outlet pipe road of process tank 4A; Confirm that other valves are in closed condition; Open the valve on process tank 4A and the tube connector that exhaust main links to each other; Open the valve on process tank 4B and the tube connector that the inlet manifold links to each other; Opening the valve parallel with the injecting type heat pump, is power with pressure reduction in two process tanks, and the interior steam of process tank 4A is flowed to process tank 4B; When pressure reduction is reduced to certain numerical value in process tank 4A, the 4B, this numerical value can be consulted the entry condition parameter that heat pump producer provides, close the valve that walks abreast with the injecting type heat pump and start the injecting type heat pump, continue the industrial steam in the process tank 4A is delivered to process tank 4B; Two jars of internal pressures equate that the back force value of continuation conveying in process tank 4A drops to design load; Close the valve between process tank 4A and the exhaust main 3; Open the valve on the pipeline between water tank 5 and the exhaust main 3, the condensed water in the water tank 5 is carried out flash distillation, and flash-off steam is drained in the process tank 4B; When the force value in the water tank 5 is reduced to design load, close the valve on the pipeline between water tank 5 and the exhaust main 3; Closing the injecting type heat pump, is that process tank 4B pressurize is until next processing procedure with steam energy storage device 1.
The foregoing description is the usefulness of explanation the utility model only, and is not to be to restriction of the present utility model, and the those of ordinary skill in relevant field on this basis, can also be made numerous variations and improvement project, and not break away from spirit of the present utility model and protection domain.In these claims, wish to have comprised all these changes and the improvement project that meets the utility model essence and scope.
Claims (9)
1. system of removing moisture in the coal with flash method, it is characterized in that: comprise steam energy storage device, inlet manifold, exhaust main, and at least two coal process tanks and at least one water tank, described coal process tank is respectively arranged with air inlet pipe, blast pipe and condensate draining pipe, described steam energy storage device is connected with the inlet manifold, described inlet manifold is connected respectively with described air inlet pipe, described exhaust main is connected respectively with described blast pipe, and described condensate draining pipe is connected with described water tank.
2. the system with moisture in the flash method removal coal according to claim 1, it is characterized in that: described exhaust main is connected by valve with described inlet manifold.
3. the system of removing moisture in the coal with flash method according to claim 1, it is characterized in that: between described exhaust main and described inlet manifold, be provided with supplied gas pressurized vapor delivery pump, described exhaust main is connected with the low-pressure gas inlet of described steam delivery pump, described steam carries delivery side of pump to be connected with described inlet manifold, also is provided with for pressurized gas inlet.
4. the system with moisture in the flash method removal coal according to claim 3, it is characterized in that: described steam delivery pump is the injecting type heat pump.
5. the system with moisture in the flash method removal coal according to claim 3, it is characterized in that: described water tank is provided with blast pipe, is connected with described exhaust main.
6. according to any described system with moisture in the flash method removal coal among the claim 1-5, it is characterized in that: be provided with discharge at described coal process tank top, described discharge is provided with the incoagulable gas blast pipe.
7. the system with moisture in the flash method removal coal according to claim 6, it is characterized in that: described coal process tank is three.
8. the system with moisture in the flash method removal coal according to claim 6, it is characterized in that: described coal process tank is four.
9. the system with moisture in the flash method removal coal according to claim 6, it is characterized in that: described blast pipe, air inlet pipe, condensate draining pipe are provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205370125U CN201803574U (en) | 2010-09-21 | 2010-09-21 | System for removing moisture in coal by flash evaporation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205370125U CN201803574U (en) | 2010-09-21 | 2010-09-21 | System for removing moisture in coal by flash evaporation method |
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| Publication Number | Publication Date |
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| CN201803574U true CN201803574U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205370125U Expired - Fee Related CN201803574U (en) | 2010-09-21 | 2010-09-21 | System for removing moisture in coal by flash evaporation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425827A (en) * | 2019-08-28 | 2019-11-08 | 上海盈达空调设备股份有限公司 | Lyophilization system based on recuperation of heat and photothermal technique |
| CN112914142A (en) * | 2021-03-05 | 2021-06-08 | 重庆中烟工业有限责任公司涪陵卷烟厂 | Condensed water discharge system of heat exchanger of cut tobacco dryer |
-
2010
- 2010-09-21 CN CN2010205370125U patent/CN201803574U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425827A (en) * | 2019-08-28 | 2019-11-08 | 上海盈达空调设备股份有限公司 | Lyophilization system based on recuperation of heat and photothermal technique |
| CN112914142A (en) * | 2021-03-05 | 2021-06-08 | 重庆中烟工业有限责任公司涪陵卷烟厂 | Condensed water discharge system of heat exchanger of cut tobacco dryer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20150921 |
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| EXPY | Termination of patent right or utility model |