CN203949163U - Cement kiln oxygen-enriched combustion system - Google Patents
Cement kiln oxygen-enriched combustion system Download PDFInfo
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- CN203949163U CN203949163U CN201420351230.8U CN201420351230U CN203949163U CN 203949163 U CN203949163 U CN 203949163U CN 201420351230 U CN201420351230 U CN 201420351230U CN 203949163 U CN203949163 U CN 203949163U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a kind of cement kiln oxygen-enriched combustion system, relate to furnace equipment technical field; The utility model adopts embrane method oxygen and the common oxygen supply of molecular sieve oxygen generation, and embrane method oxygen provides low concentration large flow oxygen enrichment, and molecular sieve oxygen generation provides high concentration low discharge oxygen enrichment, and both combine and can arbitrarily regulate oxygen enrichment flow and concentration.Mixed oxygen-enriched air after high pressure positive blower supercharging, pass into four in-duct burners spray into rotary kiln or mix with coal dust after enter dore furnace and carry out oxygen-enriched combusting.It is not remarkable that it can solve existing cement kiln energy-saving effect, the problem that soot emissions are not up to standard.
Description
Technical field
The utility model relates to furnace equipment technical field, especially a kind of cement kiln oxygen-enriched combustion system for dry-process cement rotary kiln production line.
Background technology
Energy scarcity, unusual weather conditions have become the focus of current China governments at all levels and all trades and professions first concern, along with the rapid growth of global economy, increasing to the demand of the energy, and the energy has become the bottleneck of restriction economic growth.Cement building material industry belongs to highly energy-consuming industry, 2012 the end of the year existing 5000 of China's cement production enterprise, dry cement production line reaches 1637, who knows that production capacity surpasses 1,600,000,000 tons, saving energy, lowering energy consumption and reducing pollutants discharge arduous task.The main fuel that China's cement kiln is used is coal dust, with air, makes burning combustion adjuvant, and combustion thermal efficiency is low, causes coal consumption high, and the loss of discharge flue dust is large.Cement production enterprise is paid special attention to the promotion and application of industry energy-saving technology for a long time, progressively carried out in recent years and implemented such as: adopt Novel combustion device, reduce the power-saving technologies such as the radiation loss of kiln wall, flue gas waste heat recovery, and obtained good effects of energy conservation and environmental protection.Oxygen-enriched combustion technology is receiving more and more many people's concern because of the superiority of its effects of energy conservation and environmental protection, at cement kiln application rich Combustion Technics, can obtain obvious energy-saving effect and the environmental protection effect that reduces atmosphere pollution, comprehensive benefit is very remarkable, in Western industrialized economy, oxygen-enriched combustion technology is called as " resource creation technology ".
Domestic water stall application oxygen-enriched combustion technology has precedent, considers production cost problem, and most of enterprise oxygen-enriched combustion system adopts embrane method oxygenerator to provide oxygen-enriched air, oxygen enrichment flow 3000～15000m
3/ h, oxygen-rich concentration is 22%-30%, its workflow is: air filters out the impurity such as airborne dust granules and greasy dirt through air cleaner, by air blast, send into oxygen permeable membrane separator, by water ring vacuum pump extracting vacuum, make oxygen permeable membrane separator form negative pressure, under the effect of pressure differential, infiltration rate faster oxygen takes the lead in being separated, the content that produces oxygen is the oxygen-enriched air of 28% left and right, oxygen-enriched air removes the moisture in oxygen rich gas through steam-water separator again, after high pressure positive blower supercharging, passing into three in-duct burners sprays into rotary kiln or enters dore furnace and carry out oxygen-enriched combusting.Flow and the concentration of the oxygen-enriched air that simple embrane method oxygen provides are all changeless, the production technology of cement kiln complexity are changed to the bad adaptability requiring, and energy-saving effect is not remarkable, and soot emissions are not up to standard.
Utility model content
The purpose of this utility model is to provide a kind of cement kiln oxygen-enriched combustion system, and it is not remarkable that it can solve existing cement kiln energy-saving effect, the problem that soot emissions are not up to standard.
In order to address the above problem, the technical solution adopted in the utility model is: this cement kiln oxygen-enriched combustion system, comprises air cleaner, air blast, membrane separator, vavuum pump, surge tank, the first booster fan, the second booster fan, also includes oxygen enriched powdered coal burner and molecular sieve; Described oxygen enriched powdered coal burner comprises housing; In described housing, centered by its axis, be disposed with oil gun passage, eddy flow air channel, coal air channel and direct current air channel; Described housing one end is connected with the intake stack consisting of more piece pipe, described oil gun passage, and eddy flow air channel, coal air channel and one end, direct current air channel pass from described intake stack; The described housing other end is provided with nozzle; One end, described eddy flow air channel in described housing is provided with cyclone; One end that described intake stack is stretched out in described eddy flow air channel and described direct current air channel is communicated with a wind pipeline respectively; Between described eddy flow air channel and described oil gun passage, be also provided with air channel, center; Described intake stack has at least pipe joint to be divided into two sections, and these two sections of pipes connect by elastic tube; The entrance admission of air of described air cleaner, the outlet of this air cleaner is connected with described air blast by pipeline, and the outlet of described air blast is communicated with the entrance of described membrane separator; An outlet of described membrane separator is communicated with described vacuum pump inlet by pipeline, and another outlet is for discharging waste gas; The outlet side of described vavuum pump is communicated with described surge tank, and this surge tank is provided with two gas outlets, and a described gas outlet is communicated with described the first booster fan by pipeline, and described in another, gas outlet is communicated with described the second booster fan by pipeline; The outlet of described the first booster fan is communicated with the entrance of described the first air accumulator, and the outlet of described the second booster fan is communicated with an entrance of described the second air accumulator; The outlet of described the first air accumulator is communicated with air channel, described center and the described coal air channel of described oxygen enriched powdered coal burner respectively; Another entrance of described the second air accumulator is communicated with the outlet of described molecular sieve, and its outlet is communicated with wind pipeline and the dore furnace of described oxygen enriched powdered coal burner respectively; The import of described molecular sieve is communicated with the outlet of drier, and the import of described drier is communicated with the outlet of air compressor machine; Described air blast, vavuum pump, the first booster fan, the second booster fan, air compressor machine is all connected with electrical control gear with motor-driven valve.
In technique scheme, more specifically scheme can also be: described nozzle is high dispersive exogenous wind nozzle; Described intake stack is connected with travelling car by connector.
Further: described elastic tube is bellows.
Further: described air blast is centrifugal high pressure fan; Described vavuum pump is dry type Roots vaccum pump.
Owing to having adopted technique scheme, compared with prior art, the beneficial effect having is the utility model:
1), owing to being provided with air channel, center, so the synthesis energy saving rate of this four in-duct burners can reach more than 5%;
2), owing to adopting embrane method oxygen and the common oxygen supply of molecular sieve oxygen generation, embrane method oxygen provides low concentration large flow oxygen enrichment, molecular sieve oxygen generation provides high concentration low discharge oxygen enrichment, both combine and can arbitrarily regulate oxygen enrichment flow and concentration.So, adopting after this technology, synthesis energy saving rate can reach more than 10%, has both saved the energy, has reduced again flue dust, fume emission, and economic benefit and environmental benefit are remarkable.
Domestic certain 2800TDP of the factory cement producing line of take is example, oxygen-enriched burning device (flow 9000Nm3/h, concentration 26%) and air combustion device comparison, and the integrated application effect drawing is as following table:
By above-mentioned test result calculations, year (300 days) can save mark coal: 2800 * 8 * 300=6720000 kg, and 6720 t, mark coal price by 800 yuan/t, and a year wound economic benefit is: 6720 * 1000=5376000 unit, 537.6 ten thousand yuan; Year reduce CO2 discharge capacity: 2800 * 20 * 300=16800000 kg, i.e. 16800 t, economic benefit and environmental benefit are remarkable.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is oxygen enriched powdered coal burner structural representation.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is the nozzle schematic diagram of oxygen enriched powdered coal burner.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Cement kiln oxygen-enriched combustion system shown in Fig. 1, comprises air cleaner 112, centrifugal high pressure fan 111, membrane separator 110, dry type Roots vaccum pump 109, surge tank 108, the first booster fan 106, the second booster fans 107, oxygen enriched powdered coal burner 103 and molecular sieve 114; Fig. 2, the oxygen enriched powdered coal burner 103 shown in Fig. 3 and Fig. 4 comprises housing; In housing, centered by its axis, be disposed with oil gun passage 01, eddy flow air channel 03, coal air channel 04 and direct current air channel 05; Housing one end is connected with the intake stack consisting of more piece pipe, oil gun passage 01, and eddy flow air channel 03, coal air channel 04 and 05 one end, direct current air channel pass from intake stack; The housing other end is provided with nozzle 06; 03 one end, eddy flow air channel in housing is provided with cyclone 07; One end that intake stack is stretched out in eddy flow air channel 03 and direct current air channel 05 is communicated with a wind pipeline 010 respectively; Between eddy flow air channel 03 and oil gun passage 01, be also provided with air channel, center 02; Intake stack has double section tube to be divided into two sections, and these two sections of pipes connect by bellows 09; Intake stack is connected with travelling car 08 by connector.
The entrance admission of air of air cleaner 112, the outlet of this air cleaner is connected with centrifugal high pressure fan 111 by pipeline, and the outlet of centrifugal high pressure fan 111 is communicated with the entrance of membrane separator 110; An outlet of membrane separator 110 is communicated with dry type Roots vaccum pump 109 by pipeline, and another outlet is for discharging waste gas; The outlet side of dry type Roots vaccum pump 109 is communicated with surge tank 108, and this surge tank is provided with two gas outlets, and a described gas outlet is communicated with described the first booster fan 106 by pipeline, and another gas outlet is communicated with the second booster fan 107 by pipeline; The outlet of the first booster fan 106 is communicated with the entrance of the first air accumulator 104, and the outlet of the second booster fan 107 is communicated with an entrance of the second air accumulator 105; The outlet of the first air accumulator 104 is communicated with 02He Mei air channel, air channel, oxygen enriched powdered coal burner 103 center 04 respectively; Another entrance of the second air accumulator 105 is communicated with the outlet of described molecular sieve 114, and its outlet is communicated with wind pipeline 010 and the dore furnace 102 of oxygen enriched powdered coal burner 103 respectively; The import of molecular sieve 114 is communicated with the outlet of drier 115, and the import of drier 115 is communicated with the outlet of air compressor machine 116; Centrifugal high pressure fan 111, dry type Roots vaccum pump 109, the first booster fan 106, the second booster fans 107, air compressor machine 116 is all connected with electrical control gear 117 with motor-driven valve.
Air cleaner 112 is communicated with extraneous natural air, outlet connects the import of centrifugal high pressure fan 111 by pipeline, air cleaner 112 is equipped with double-stage high-efficient cartridge filter, one-level wet filter cylinder can filtering air under water spray condition in most of dust granules and greasy dirt, secondary dry filter cylinder can filtering remain granule dust, and filter efficiency reaches 99%; Centrifugal high pressure fan 111 import configuration manually-operated gates are controlled air quantity, be communicated with air cleaner 112 pure air is sent into membrane separator 110; Membrane separator 110 is all joined by air that case, membrane module, oxygen enrichment are all in charge of, shell forms, the high-pressure blast that centrifugal high pressure fan 111 is sent into enters air and all joins case and pass into respectively membrane module to carry out oxygen, nitrogen separated, oxygen-enriched air passes into the import of dry type Roots vaccum pump 109 after being collected by oxygen enrichment divider, membrane separator 110 is assembled splicing according to the quantity of membrane module, reaches the oxygen enrichment flow of manufacturing technique requirent.Dry type Roots vaccum pump 109, compares water ring vacuum pump and has omitted water circulation drying equipment, and the oxygen-enriched air temperature after compression reaches 120～150 ℃, has improved the oxygen-enriched combusting thermal efficiency.Drier 115 imports connect air compressor machine 116 outlets, the air of air compressor machine 116 inputs is dried to dehumidification to be processed, dried air passes into molecular sieve 114, molecular sieve 114 removes airborne nitrogen adsorption under condition of high voltage, and the oxygen-enriched air after desorb accesses the second air accumulator 105 by pipeline valve and stores.The oxygen enriched powdered coal burner 103 in four air channels is compared three in-duct burners has increased centre wind, the design of centre wind can the smooth combustion length of flame and temperature, and the negative pressure of recirculating zone, capable of regulating jet-core region, change position and the size of head high-temperature region, promote the burning of fixed carbon, can also reduce the O in flame
2concentration, thus NO reduced
xgeneration.Electrical control gear 117 comprises switch board, middle control machine, sensor, thermometer, flowmeter, pressure gauge, analyzer, motor-driven valve, switch board comprises that single device starts cabinet, in connecting by signal cable, control machine touch-screen, display screen, thermometer, flowmeter, pressure gauge, motor-driven valve are controlled host computer in accessing by sensor cable, thereby measure temperature, flow, the pressure and other parameters of each monitoring point oxygen enrichment wind.
The utility model adopts embrane method oxygen and the common oxygen supply of molecular sieve oxygen generation, and embrane method oxygen provides low concentration large flow oxygen enrichment, and molecular sieve oxygen generation provides high concentration low discharge oxygen enrichment, and both combine and can arbitrarily regulate oxygen enrichment flow and concentration.The oxygen enrichment flow of embrane method oxygenerator is 3000～15000m
3/ h, oxygen-rich concentration is 22%-30%.Molecular sieve oxygen generator oxygen enrichment flow is 40～130m
3/ h, oxygen-rich concentration is 30%～50%.Mixed oxygen-enriched air after high pressure positive blower supercharging, pass into four in-duct burners spray into rotary kiln or mix with coal dust after enter dore furnace and carry out oxygen-enriched combusting.In combustion-supporting field, oxygen-rich concentration overall economic efficiency when 30% left and right is the highest, and embrane method oxygen and molecular sieve oxygen generation integrated application can reach the oxygen concentration of technological requirement.This energy conserving system is mainly by installing oxygen-enriched combusting energy saver additional, improves fuel economy, reclaims the compression heat energy of oxygen-enriched air simultaneously and realizes energy-conservation and reduce toxic emission.The synthesis energy saving rate of implementing after this combustion energy saving system can reach more than 10%, has both saved the energy, has reduced again flue dust, fume emission, is the rare energy efficiency technology of cement building material industry.
Claims (4)
1. a cement kiln oxygen-enriched combustion system, comprise air cleaner (112), air blast (111), membrane separator (110), vavuum pump (109), surge tank (108), the first booster fan (106), the second booster fan (107), is characterized in that: also include oxygen enriched powdered coal burner (103) and molecular sieve (114); Described oxygen enriched powdered coal burner (103) comprises housing; In described housing, centered by its axis, be disposed with oil gun passage (01), eddy flow air channel (03), coal air channel (04) and direct current air channel (05); Described housing one end is connected with the intake stack consisting of more piece pipe, described oil gun passage (01), eddy flow air channel (03), coal air channel (04) and one end, direct current air channel (05) pass from described intake stack; The described housing other end is provided with nozzle (06); One end, described eddy flow air channel (03) in described housing is provided with cyclone (07); One end that described intake stack is stretched out in described eddy flow air channel (03) and described direct current air channel (05) is communicated with a wind pipeline (010) respectively; Between described eddy flow air channel (03) and described oil gun passage (01), be also provided with air channel, center (02); Described intake stack has at least pipe joint to be divided into two sections, and these two sections of pipes connect by elastic tube (09); The entrance admission of air of described air cleaner (112), the outlet of this air cleaner is connected with described air blast (111) by pipeline, and the outlet of described air blast (111) is communicated with the entrance of described membrane separator (110); An outlet of described membrane separator (110) is communicated with described vavuum pump (109) entrance by pipeline, and another outlet is for discharging waste gas; The outlet side of described vavuum pump (109) is communicated with described surge tank (108), this surge tank is provided with two gas outlets, a described gas outlet is communicated with described the first booster fan (106) by pipeline, and described in another, gas outlet is communicated with described the second booster fan (107) by pipeline; The outlet of described the first booster fan (106) is communicated with the entrance of the first air accumulator (104), and the outlet of described the second booster fan (107) is communicated with an entrance of the second air accumulator (105); The outlet of described the first air accumulator (104) be communicated with air channel, described center (02) and the described coal air channel (04) of described oxygen enriched powdered coal burner (103) respectively; Another entrance of described the second air accumulator (105) is communicated with the outlet of described molecular sieve (114), and its outlet is communicated with a wind pipeline (010) and the dore furnace (102) of described oxygen enriched powdered coal burner (103) respectively; The import of described molecular sieve (114) is communicated with the outlet of drier (115), and the import of described drier (115) is communicated with the outlet of air compressor machine (116); Described air blast (111), vavuum pump (109), the first booster fan (106), the second booster fan (107), air compressor machine (116) is all connected with electrical control gear (117) with motor-driven valve.
2. cement kiln oxygen-enriched combustion system according to claim 1, is characterized in that: described nozzle (06) is high dispersive exogenous wind nozzle; Described intake stack is connected with travelling car (08) by connector.
3. cement kiln oxygen-enriched combustion system according to claim 1 and 2, is characterized in that: described elastic tube (09) is bellows.
4. cement kiln oxygen-enriched combustion system according to claim 1 and 2, is characterized in that: described air blast (111) is centrifugal high pressure fan; Described vavuum pump (109) is dry type Roots vaccum pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420351230.8U CN203949163U (en) | 2014-06-28 | 2014-06-28 | Cement kiln oxygen-enriched combustion system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420351230.8U CN203949163U (en) | 2014-06-28 | 2014-06-28 | Cement kiln oxygen-enriched combustion system |
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| CN203949163U true CN203949163U (en) | 2014-11-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033893A (en) * | 2014-06-28 | 2014-09-10 | 广西聚为能源科技有限公司 | Oxygen-enriched combustion system of cement klin |
| TWI655396B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Supercharged burner |
| TWI655397B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Turbocharged burner |
-
2014
- 2014-06-28 CN CN201420351230.8U patent/CN203949163U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033893A (en) * | 2014-06-28 | 2014-09-10 | 广西聚为能源科技有限公司 | Oxygen-enriched combustion system of cement klin |
| CN104033893B (en) * | 2014-06-28 | 2016-01-20 | 广西聚为能源科技有限公司 | Cement kiln oxygen-enriched combustion system |
| TWI655396B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Supercharged burner |
| TWI655397B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Turbocharged burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141119 Effective date of abandoning: 20160120 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |