CN103063046B - The process of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique - Google Patents
The process of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique Download PDFInfo
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- CN103063046B CN103063046B CN201310028103.4A CN201310028103A CN103063046B CN 103063046 B CN103063046 B CN 103063046B CN 201310028103 A CN201310028103 A CN 201310028103A CN 103063046 B CN103063046 B CN 103063046B
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Abstract
The invention discloses the process of a kind of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique, comprise the following steps: 1) pretreatment; 2) cool; 3) burning heat production; 4) heat energy utilization.Closed type calcium carbide furnace exhaust gas dust of the present invention process and UTILIZATION OF VESIDUAL HEAT IN technique, closed type calcium carbide furnace dust is applied to coal-burning boiler, overcome the exhaust gas dust process for cooling difficult point in traditional handicraft, solve the process for cooling of dust, dust and add technological requirement on boiler, reach dust combustion and produce heat, the effect of bringing extra power into play, the treatment of wastes with processes of wastes against one another, solve the difficult problem of environmental protection of dust pollution, realize the fire coal saving of boiler.
Description
Technical field
The present invention relates to the pollutant exhaust gas dust process that closed type calcium carbide furnace produces, particularly closed type calcium carbide furnace dust is processed, the effect of bringing extra power into play, solve the difficult problem of environmental protection of dust pollution, realize coal-fired saving.
Background technology
In calcium carbide production, carbon material and lime react, and generate calcium carbide (calcium carbide) and CO.Calcium carbide industry main production plant is furnace of calcium carbide, is divided into internal combustion type furnace of calcium carbide and closed type calcium carbide furnace two class.
Closed type calcium carbide furnace, by installing bell additional, makes furnace of calcium carbide airtight, has completely cut off extraneous air, and the CO gas air-extractor produced by calcium carbide production process is extracted out and utilized.Auto feed pipe is equipped with bell simultaneously.Closed type calcium carbide furnace is also supporting the device such as electrode control system, flue gas cleaning system.Compared with the first two type of furnace, closed type calcium carbide furnace due on boiler face without combustion flame, carbon material combustible loss and heat-energy losses little, simultaneously calcium carbide furnace gas can be used as after purified treatment gas burning lime kiln fuel or as organic synthesis raw material, accomplish that resource makes full use of; Do not have flame and dust around furnace of calcium carbide, boiler face device temperature is lower, improves work, safe operating conditions; Furnace charge is fed in raw material by auto feed pipe, and press the operations such as electrode and adopt Automated condtrol, mechanization degree is high, and equipment runs reliably safer.
Internal combustion type furnace of calcium carbide is compared with closed type calcium carbide furnace, and energy consumption of unit product is higher, and waste discharge amount is comparatively large, has the Eleventh Five-Year Plan period been forced to eliminate.At present, the closed type calcium carbide furnace production technology that China has independent intellectual property right is ripe, and has had the application of certain scale.Carry out the ripe of internal combustion type furnace of calcium carbide transformation closed type calcium carbide furnace comprehensively.At present, country carries out the internal combustion type furnace of calcium carbide before replacing with closed type calcium carbide furnace.2007, clearly newly-built furnace of calcium carbide in " calcium carbide industry entry criteria (revision in 2007) " regulation that the National Development and Reform Commission of the People's Republic of China (PRC) announces 2007 No. 70, closed type calcium carbide furnace must be adopted, the beginning of this year, Ministry of Industry and Information of country issues " closed type calcium carbide furnace power-saving technology promotion and implementation scheme " and plans in " 12 " period, the internal combustion type furnace of calcium carbide of transformation 5,000,000 tons of production capacities.The sharpest edges of closed type calcium carbide furnace are, the furnace gas of furnace of calcium carbide is all collected, and after purification, the furnace gas after purification is recycled, achieves the comprehensive utilization of the energy, achieve energy-saving and emission-reduction.After internal combustion type furnace of calcium carbide is in the past transformed into closed type calcium carbide furnace, unit calcium carbide comprehensive energy consumption can decline 0.2 ton of standard coal.
Before this, industry has mainly done a lot of research to the dust that internal combustion type furnace of calcium carbide produces, internal combustion type furnace of calcium carbide in the past, produce tail gas and dust in combustible all burn on furnace of calcium carbide road surface, again the gas band dust after burning is directly discharged or discharges after dedusting, it is produced to the process of dust, generally adopt the processing methods such as bottom, brickmaking, desulfurization of paving the way.
But closed type calcium carbide furnace vent gas treatment and the process of internal combustion type calcium carbide stove exhaust have had larger difference, and its composition there has also been larger difference.Its tail gas is in purification process, and the dust in furnace gas is all separated, and this dust contains a large amount of easy spontaneous combustible substances, when temperature more than 35 DEG C, and as easy as rolling off a log generation spontaneous combustion.Some factory adopts and adds running water cooling, both wastes water, and the Cucumber reaction in water and dust, has again the generation of cyanide, pollute environment.A lot of factory has to dust to be stacked, and causes new pollution, due to dust spontaneous combustion in atmosphere, pollutes air, and combustion high temperature is a potential safety hazard.How a large amount of dust processes, and has just become a difficult problem.
The application of current closed type calcium carbide furnace exhaust gas dust mainly contains following several:
One is, first allows dust spontaneous combustion, after the powder after burning cools naturally, as the raw material of cement, the shortcoming of this application process is that the time of powder spontaneous combustion and cooling is oversize, and usual dust does not all cool down for one month, and the raw material of making cement is worth too low, is about about 15 yuan/ton.If not self-built cement plant, needing transport, is uneconomic.
Two are, first allow dust spontaneous combustion, after the powder after burning cools naturally, as doing building brick, but the brick that the method is produced is yielding, and compression strength is poor, and quality does not reach national standard requirement, therefore, this brick can only be used for less demanding occasion, as the pigsty, enclosure wall etc. on farm.
Three are, first with running water cooling, but a small amount of cyanide pollution environment produced, add processing cost, water will be participated chemical reaction, and therefore water consumption is large, and cost is high.So the method application seldom.
So, a kind of process processing closed type calcium carbide furnace exhaust gas dust of special needs at present.
Summary of the invention
The object of the invention is to for the above demand for production technology, the process of a kind of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique are provided, closed type calcium carbide furnace dust is applied to coal-burning boiler, overcome the exhaust gas dust process for cooling difficult point in traditional handicraft, solve the process for cooling of dust, dust and add technological requirement on boiler, reach dust combustion and produce heat, the effect of bringing extra power into play, solve the difficult problem of environmental protection of dust pollution, realize the fire coal saving of boiler.
In order to realize foregoing invention object, the technical solution used in the present invention is as follows:
The process of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique, comprise the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, and in ash bucket, be filled with nitrogen-sealed and preserve, this exhaust gas dust is through test, and temperature is 80-160 DEG C;
2) cool: by sealable discharge valve, put into by dust in special cooling device ash cooler, ash cooler is rotary, heat exchange type cooling device, take seal approach, be filled with nitrogen protection, before cooling, dust temperature is 80-160 DEG C, when dust temperature is lower than 35 DEG C after cooling, reach qualified;
3) to burn heat production: the mode that the closed type calcium carbide furnace exhaust gas dust by inflated with nitrogen and after cooling processing is sent by wind, deliver to ash-storing bin to store, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also desulfidation is had concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
Closed type calcium carbide furnace flue gas through the main component of the dust that purification separation is got off is: fixed carbon: 8-15%, fugitive constituent: 16-30%; Oxide: 50-60%, in the dust after cold, heat content is: 1000-1600 kg/kg; The temperature of dust is: 80-160 DEG C; The granularity of dust is below 200 orders.
Due in dust, have the inflammable constituent such as tar, fugitive constituent to exist, the dust temperature separated is 80-160 DEG C, and therefore, this dust meets air just burning, needs to take airtight, inflated with nitrogen protection cooling.The present invention adopts special cooler, and dust fully cools, and seals, be filled with nitrogen from porch with dust at whole cooling system, prevents burning.
Owing to there being the oxides such as calcium oxide to exist in dust, also have desulfidation, use this method, can remove the sulfur dioxide of about 90%, the concentration of emission of sulfur dioxide is less than 700mg/Nm
3, reach country " discharge standard of air pollutants " (GB16297-1996) set quota completely.
Preferably, step 2) in dust feeding coal be: 0.6 ~ 1 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02 MPa; Cooling water pressure is 0.25 ~ 0.35MPa; Cooler-water temperature degree is lower than 30 DEG C.
Step 2) in ash cooler be rotary, centre has cooler, and cooler is pipe heat exchanger, adopts multitube block form, band helicla flute in pipe, ash cooler horizontal by 0-15 degree angle, feeding mouth and discharging opening is contour or feeding mouth higher than discharging opening.
For dust is by passage in described pipe type heat transfer organ pipe, outside pipe and between cooler casing, be cooling water cavity, cooling water cavity is divided into multiple water channel, and cooling water enters back from same axle head.
Pan feeding and the discharging opening of ash cooler all have sealer.
Ash cooler of the present invention contains a large amount of easy spontaneous combustible substances for closed type calcium carbide furnace exhaust gas dust, the feature of as easy as rolling off a log generation spontaneous combustion time more than temperature 50 C, design is unique, solve traditional cooling device cooling effectiveness not high, easily to catch fire the defect such as dust pollution environment of breaking out of fire, generation, for dust is applied to coal-burning boiler, the effect of bringing extra power into play, solve dust pollution the difficult problem of environmental protection, realize boiler fired coal saving etc. equipment support be provided.
The heat (being mainly powdered carbon and tar etc.) that dust includes, mean calorie is 1300 kcal/kg, and feed postition can with two kinds, and a kind of is burner hearth lateral opening at boiler, and for 75 tons of boilers, opening access tube is DN65, three pipes.The mode that dust send with wind adds.Enter burner hearth by aforesaid way, combustible at high temperature burns, and produces heat, for heating boiler.
Dust is by addition 0.5 ton/hour, and heat is 650000 kilocalories, can produce steam 1.08 tons, saves standard coal 92.9 kgs/hour.
Dust is by addition 1 ton/hour, and heat is 1300000 kilocalories, can produce steam 2.16 tons, saves standard coal 185.8 kgs/hour.
Press through vapours, low-pressure superheated steam or low-pressure saturated steam in producing in step 4) in order to promote turbocompressor, or be used for generating or other process steam or life steam.
Another kind method is by cooled dust, first mixes with fire coal, then adds boiler.This mode, adding use procedure dust greatly, reduces efficiency of combustion, does not advocate use.
Economic benefit: mean calorie 1300 kcal/kg in dust, bring benefits into: 130 yuan/ton.The factory of a general annual output 300000 tons of calcium carbides, annual 1.5 ten thousand tons, generation flue gas coming from carbide furnace dust, containing available economic worth 1,950,000 yuan.
Compared with prior art, the invention has the beneficial effects as follows:
Closed type calcium carbide furnace exhaust gas dust of the present invention process and UTILIZATION OF VESIDUAL HEAT IN technique, closed type calcium carbide furnace dust is applied to coal-burning boiler, overcome the exhaust gas dust process for cooling difficult point in traditional handicraft, solve the process for cooling of dust, dust and add technological requirement on boiler, reach dust combustion and produce heat, the effect of bringing extra power into play, the treatment of wastes with processes of wastes against one another, solve the difficult problem of environmental protection of dust pollution, realize the fire coal saving of boiler.
Accompanying drawing explanation
Fig. 1 is closed type calcium carbide furnace exhaust gas dust cooling system structure schematic diagram of the present invention.
Mark in figure: 1 for dust collector ash hopper, and 2 is feeding pipe, and 3 is ash cooler, 4 are filled with mouth for nitrogen, and 5 is sealer, and 6 is transmission system, and 7 is cooling water connector, and 8 is surge bunker, and 9 is blower fan, and 10 is ash conveying device, and 11 is rotary feeder.
Detailed description of the invention
Below in conjunction with detailed description of the invention, foregoing invention content of the present invention is described in further detail.
But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should comprise within the scope of the invention.
embodiment 1
The present embodiment comprises the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, in ash bucket, is filled with nitrogen-sealed and preserves;
2) cool: by sealable discharge valve, put into by dust in special cooling device ash cooler, ash cooler is rotary, heat exchange type cooling device, takes seal approach, is filled with nitrogen protection, and dust temperature is: 80 DEG C; Dust feeding coal is: 1 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02 MPa; Cooling water pressure is 0.35MPa; Cooler-water temperature degree is: lower than 30 DEG C; With this understanding, after cooling, dust temperature is lower than 35 DEG C, reaches qualified;
3) burning heat production: the mode sent by wind by the closed type calcium carbide furnace exhaust gas dust after inflated with nitrogen cooling processing, is delivered to ash-storing bin and stores, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also has desulfidation concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
embodiment 2
The present embodiment comprises the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, in ash bucket, is filled with nitrogen-sealed and preserves;
2) cool: by sealable discharge valve, put into by dust in special cooling device ash cooler, ash cooler is rotary, heat exchange type cooling device, takes seal approach, is filled with nitrogen protection, and dust temperature is: 100 DEG C; Dust feeding coal is: 0.9 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02 MPa; Cooling water pressure is 0.3MPa; Cooler-water temperature degree is: lower than 30 DEG C; With this understanding, after cooling, dust temperature is lower than 35 DEG C, reaches qualified;
3) burning heat production: the mode sent by wind by the closed type calcium carbide furnace exhaust gas dust after inflated with nitrogen cooling processing, is delivered to ash-storing bin and stores, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also has desulfidation concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
embodiment 3
The present embodiment comprises the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, in ash bucket, is filled with nitrogen-sealed and preserves;
2) cool: by sealable discharge valve, put into by dust in special cooling device ash cooler, ash cooler is rotary, heat exchange type cooling device, takes seal approach, is filled with nitrogen protection, and dust temperature is: 120 DEG C; Dust feeding coal is: 0.8 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02 MPa; Cooling water pressure is 0.35MPa; Cooler-water temperature degree is: lower than 30 DEG C; With this understanding, after cooling, dust temperature is lower than 35 DEG C, reaches qualified;
3) burning heat production: the mode sent by wind by the closed type calcium carbide furnace exhaust gas dust after inflated with nitrogen cooling processing, is delivered to ash-storing bin and stores, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also has desulfidation concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
embodiment 4
The present embodiment comprises the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, in ash bucket, is filled with nitrogen-sealed and preserves;
2) cool: by sealable discharge valve, put into by dust in special cooling device ash cooler, ash cooler is rotary, heat exchange type cooling device, takes seal approach, is filled with nitrogen protection, and dust temperature is: 140 DEG C; Dust feeding coal is: 0.7 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02 MPa; Cooling water pressure is 0.25MPa; Cooler-water temperature degree is: lower than 30 DEG C; With this understanding, after cooling, dust temperature is lower than 35 DEG C, reaches qualified;
3) burning heat production: the mode sent by wind by the closed type calcium carbide furnace exhaust gas dust after inflated with nitrogen cooling processing, is delivered to ash-storing bin and stores, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also has desulfidation concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
embodiment 5
The present embodiment comprises the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, in ash bucket, is filled with nitrogen-sealed and preserves;
2) cool: by sealable discharge valve, put into by dust in special cooling device ash cooler, ash cooler is rotary, heat exchange type cooling device, takes seal approach, is filled with nitrogen protection, and dust temperature is: 160 DEG C; Dust feeding coal is: 0.6 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02 MPa; Cooling water pressure is 0.3MPa; Cooler-water temperature degree is: lower than 30 DEG C; With this understanding, after cooling, dust temperature is lower than 35 DEG C, reaches qualified;
3) burning heat production: the mode sent by wind by the closed type calcium carbide furnace exhaust gas dust after inflated with nitrogen cooling processing, is delivered to ash-storing bin and stores, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also has desulfidation concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
embodiment 6
Above embodiment adopts closed type calcium carbide furnace exhaust gas dust cooling system as shown in Figure 1 carry out step 2) cooling processing.
The exhaust gas dust that closed type calcium carbide furnace purification produces is stored in dust collector ash hopper 1; by rotary feeder 11; ash cooler 3 is controllably added by feeding pipe 2; feeding pipe 2 is provided with nitrogen and is filled with mouth 4; be filled with protective gas nitrogen; ash cooler 3 is rotary; there is provided power around middle shaft rotation by transmission system 6; in the middle of ash cooler 3, there is cooler; cooler is pipe heat exchanger, adopts multitube block form, band helicla flute in pipe; ash cooler 3 horizontal by 0-15 degree angle, feeding mouth and discharging opening is contour or feeding mouth higher than discharging opening.For dust is by passage in pipe type heat transfer organ pipe, outside pipe and between cooler casing, be cooling water cavity, herein, cooling water cavity is divided into 4 water channels, enters back from same axle head, and cooling water connector 7 adopts the swivel joint that two-way circulates.The pan feeding of ash cooler 3 and discharging opening all have sealer 5, and seal member is spring leaf, ensure ash cooler in the case of rotation, and sealing is reliable.Exhaust gas dust, after supercooling, enters surge bunker 8, then through rotary feeder 11, controlled feeds ash conveying device 10, by the form that wind send, use blower fan 9 to send into ash-storing bin and store, afterwards, send into coal furnace burner hearth on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also desulfidation is had concurrently.The steam produced in order to promote turbocompressor, or is used for generating or other process steam or life steam.
Quality inspection shows, closed type calcium carbide furnace dust is applied to coal-burning boiler by technique of the present invention, overcome the exhaust gas dust process for cooling difficult point in traditional handicraft, solve the process for cooling of dust, dust and add technological requirement on boiler, reach dust combustion and produce heat, the effect of bringing extra power into play, solves the difficult problem of environmental protection of dust pollution, realizes the fire coal saving of boiler.
Claims (4)
1. the process of closed type calcium carbide furnace exhaust gas dust and UTILIZATION OF VESIDUAL HEAT IN technique, is characterized in that comprising the following steps:
1) pretreatment: after closed type calcium carbide furnace exhaust gas dust is separated, collects in dust collector ash hopper, in ash bucket, be filled with nitrogen-sealed preserve, this exhaust gas dust temperature through probe temperature be 80-160 DEG C;
2) cool: by sealable discharge valve, dust is put in special cooling device ash cooler, described ash cooler is rotary, centre has cooler, cooler is pipe heat exchanger, adopt multitube block form, pipe in band helicla flute, ash cooler horizontal by 0-15 degree angle, feeding mouth and discharging opening is contour or feeding mouth higher than discharging opening, described feeding mouth, discharging opening all have sealer, and seal member is spring leaf, is filled with nitrogen protection, before cooling, dust temperature is 80-160 DEG C, when dust temperature is lower than 35 DEG C after cooling, reach qualified;
3) burning heat production: the mode that the closed type calcium carbide furnace exhaust gas dust after inflated with nitrogen cooling processing is sent by wind, deliver to ash-storing bin to store, afterwards, send into coal-fired furnace cavity on demand, exhaust gas dust in boiler with coal-fired cofiring, produce heat, co-production steam, meanwhile, also desulfidation is had concurrently;
4) heat energy utilization: course of reaction is with the releasing of a large amount of reaction heat, and High Temperature Gas presses through vapours in being produced by middle pressure waster heat boiler, High Temperature Gas enters low pressure waste heat boiler and produces low-pressure superheated steam or low-pressure saturated steam.
2. closed type calcium carbide furnace exhaust gas dust process as claimed in claim 1 and UTILIZATION OF VESIDUAL HEAT IN technique, is characterized in that: step 2) in dust feeding coal be: 0.6 ~ 1 ton/hour; Inflated with nitrogen pressure is: 0.01 ~ 0.02MPa; Cooling water pressure is 0.25 ~ 0.35MPa; Cooler-water temperature degree is lower than 30 DEG C.
3. closed type calcium carbide furnace exhaust gas dust process as claimed in claim 1 and UTILIZATION OF VESIDUAL HEAT IN technique, it is characterized in that: for dust is by passage in described pipe type heat transfer organ pipe, outside pipe and between cooler casing, be cooling water cavity, cooling water cavity is divided into multiple water channel, and cooling water enters back from same axle head.
4. closed type calcium carbide furnace exhaust gas dust process as claimed in claim 1 and UTILIZATION OF VESIDUAL HEAT IN technique, it is characterized in that: step 4) in produce in press through vapours, low-pressure superheated steam or low-pressure saturated steam in order to promote turbocompressor, or be used for generating or other process steam or life steam.
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| RU110734U1 (en) * | 2011-06-07 | 2011-11-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Сибирскиий федеральный университет" (СФУ) | LINE FOR PROCESSING CARBON CARBONATE MINERAL RAW MATERIALS |
| CN102641637A (en) * | 2012-04-10 | 2012-08-22 | 安徽省元琛环保科技有限公司 | Dust removal system with novel bypass device |
| CN202547416U (en) * | 2012-04-20 | 2012-11-21 | 南京苏冶钙业技术有限公司 | Tail gas utilization system of calcium carbide furnace |
| CN102829642A (en) * | 2012-09-24 | 2012-12-19 | 天津辰创环境工程科技有限责任公司 | Furnace dust incineration processing method of calcium carbid furnace |
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