CN201381284Y - Oxygen-enriched combustion supporting device of vertical mixture kiln - Google Patents
Oxygen-enriched combustion supporting device of vertical mixture kiln Download PDFInfo
- Publication number
- CN201381284Y CN201381284Y CN200920152049U CN200920152049U CN201381284Y CN 201381284 Y CN201381284 Y CN 201381284Y CN 200920152049 U CN200920152049 U CN 200920152049U CN 200920152049 U CN200920152049 U CN 200920152049U CN 201381284 Y CN201381284 Y CN 201381284Y
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- oxygen
- air
- kiln
- supply pipeline
- pipeline
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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
An oxygen-enriched combustion supporting device of vertical mixture kiln is characterized in that the outlet of a blower is connected with an air supply pipe; an oxygen flowmeter is mounted on the air supply pipe; an oxygen distributor is mounted in the air supply pipe; and the tail section is communicated with an air chamber below the kiln. An oxygen supply pipe is connected with the air supply pipe in parallel; an adjusting valve group for controlling the oxygen flow rate is arranged on the oxygen supply pipe; and an air branch pipe is connected with the oxygen pipe of the oxygen distributor, and the other end is connected with the upper part of an ash hoist to form an air seal. The oxygen distributor connected with the oxygen pipe not only can improve the oxygen concentration, reduce fuel and improve the concentration of the kiln gas CO2, but also can reduce the blower current by about 13% under the same kiln load. The air branch pipe led from the pipe before mixing of the oxygen and the air can supply common air to the upper par of the ash hoist to form the air seal so as to reduce oxygen leakage from the ash hoist.
Description
Technical field:
The utility model relates to a kind of oxygen-enriched combustion-supporting device of batch mixing shaft furnace, a kind of specifically oxygen-enriched combustion-supporting device that is applied to the vertical limestone kilns of industry batch mixing such as chemical industry, metallurgy, sugaring.
Background technology:
Present domestic chemical industry, metallurgy, sugaring, the vertical limestone kiln of the employed big machinery batch mixing of building trade generally use gas blower that air is sent into combustion-supporting mode in the kiln.Utilize air-breathing limestone kiln, because O in the air
2Concentration have only 20.9%, and nitrogen and other rare gas element account for the overwhelming majority, this most of gas to fuel combustion again without any effect, cause calcining zone longer, fuel combustion is insufficient, and calcining temperature is lower, thereby causes fuel consumption higher, and since the increase of fuel, CO in the gas that causes being produced
2Concentration is on the low side, so CO in the kiln gas of common lime kiln generation
2Concentration is difficult to reach more than 42%, and this is to the needs high concentration CO
2System alkali, sugar manufacturing industry totally unfavorable.
The utility model content:
Goal of the invention of the present utility model is the many deficiencies at prior art, provides a kind of and can reduce the limestone kiln fuel consumption, improves the CO in the output gas
2Concentration and the oxygen-enriched combustion-supporting device that improves the vertical limestone kiln of batch mixing of limestone kiln throughput.
Realize the foregoing invention purpose by the following technical solutions: the oxygen-enriched combustion-supporting device in the vertical limestone kiln of a kind of batch mixing, comprise gas blower, the oxygen divider, be positioned at the DCS controller outside the device, described blower export is connected with the air-supply pipeline, on the described air-supply pipeline oxygen flow meter is installed, the inside of air-supply pipeline is equipped with the oxygen divider, the afterbody of air-supply pipeline is communicated with the air compartment that is positioned at the bottom, limestone kiln, the oxygen therapy pipeline is provided with the air-supply pipeline with the blast tube line parallel and is connected, this oxygen therapy pipeline is provided with the variable valve group of regulating and controlling amount of oxygen, branch wind pipe is connected with the air-supply pipeline that is positioned at oxygen divider leading portion, and the other end and ash hoist top are connected to form sealing gland.
Adopt technique scheme, compared with prior art, the utility model is on the air-supply pipeline of blower export, install the oxygen divider additional, the oxygen divider is connected with oxygen pipeline, and air mixes with oxygen process oxygen divider, and the oxygen-rich air after guaranteeing to mix enters in the air compartment of bottom, limestone kiln, enter respectively in the kiln along air main, branch wind pipe then, participate in the calcination reaction of Wingdale.The utility model not only can improve oxygen concentration, reduces fuel, improves kiln gas CO
2Concentration, and identical limestone kiln load is down, and blower current descends about 13%.In addition, because the ash hoist in large-scale limestone kiln generally belongs to the system of working continuously, some oxygen enrichment must be revealed by ash hoist, has caused the waste that adds oxygen.In order to address this problem, draw a branch wind pipe line on the pipeline of the utility model before oxygen (or oxygen enrichment) and air mixed, normal air is delivered to the ash hoist top form sealing gland, thereby reduce the leakage that ash hoist causes oxygen.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an oxygen dispensing arrangement synoptic diagram.
Among the figure, gas blower 1, blast tube 2, variable valve group 3, oxygen therapy tracheae line 4, vacuum breaker 5, spark arrester 6, mixing tube 7, oxygen divider 8, oxygen flow meter 9, branch wind pipe 10, stopping valve 11, air compartment 12, ash hoist 13, limestone kiln 14.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further
The utility model is supplied with control, oxygen mix, branch wind pipe, safeguard protection four parts by oxygen and is formed.
See Fig. 1, the oxygen supply control part divides by oxygen therapy pipeline 4, air-supply pipeline 2 etc. and forms, and on the oxygen therapy pipeline 4 variable valve group 3 is installed, and the rear of oxygen therapy pipeline 4 is installed vacuum breaker 5, spark arrester 6, vacuum breaker 5 is connected with spark arrester 6, and the other end of spark arrester 6 is connected with air-supply pipeline 2.The front end of air-supply pipeline 2 is communicated with the outlet of gas blower 1, and the central position of the inside of air-supply pipeline 2 is equipped with oxygen divider 8, on the air-supply pipeline 2 oxygen flow meter 9 is installed.The variable valve group 3 usefulness pipelines and the oxygen flow meter 9 that are installed on the oxygen therapy pipeline 4 are used.Oxygen therapy pipeline 4 be arranged in parallel with air-supply pipeline 2, and the mixing tube 7 (tail end of the pipeline of just blowing) after two pipelines connect is communicated with the air compartment 12 of 14 bottoms, limestone kiln.
Air-supply pipeline 2 before the front end of branch wind pipe 10 and the air mixed is communicated with, and stopping valve 11 is installed on the branch wind pipe 10, and the tail end of branch wind pipe 10 is connected with the upper end of ash hoist 13, and ash hoist 13 is communicated with limestone kiln 14.The effect of branch wind pipe 10 is normal air to be delivered to the top formation sealing gland of ash hoist 13, thereby reduces the waste that causes oxygen because of ash hoist 13 leakages.The air quantity control of branch wind pipe 10 realizes by stopping valve 11.
Working process of the present utility model:
Referring to accompanying drawing 1, at first, by oxygen therapy pipeline 4 and air-supply pipeline 2 delivering oxygens and air, with the certain density oxygen-rich air of oxygen divider 8 preparations, according to the air flow quantity of limestone kiln 14 needs, the concentration that adds oxygen (or oxygen enrichment) and the numerical value between the desired oxygen-rich concentration three of technology, calculate oxygen (or oxygen enrichment) amount of required adding by DCS (or PLC) Controlling System, automatically regulate variable valve group 3 on oxygen therapy (or oxygen enrichment) pipeline 4 according to this numerical value, stable with the oxygen-rich concentration that guarantees processing requirement.Limestone kiln 14 desired air flow quantitys are according to producing the load decision, numerical value is provided by oxygen flow meter 9, the concentration of oxygen (or oxygen enrichment) provides data by analyzing and testing, the desired oxygen-rich concentration of technology, and the operator can set numerical value according to the working order in limestone kiln 14.This pressure of crossing range request oxygen (or oxygen enrichment) is installed vacuum breaker 5 and spark arrester 6 on oxygen therapy (or oxygen enrichment) pipeline 4 simultaneously greater than kiln bottom pressure 0.1MPa, to avoid security incident.
Oxygen (or oxygen enrichment) and Air mixing are referring to accompanying drawing 2: even in order to guarantee mixed oxygen-rich air concentration, at the center of air-supply pipeline 2 inside an oxygen divider 8 is installed, on the oxygen divider 8 uniform porose (60 degree holes, angle amount to 6 holes).Its function is that it is even to reach concentration with air and oxygen thorough mixing, so that satisfy the gas that the limestone kiln requires.Oxygen divider 8 will guarantee certain distance apart from kiln internal reaction district, has an accident in case mix inequality.
The leakage that reduces oxygen-rich air is referring to accompanying drawing 1: because ash hoist 13 draws off the high temperature lumpy material continuously, certainly lead to the leakage of gas.Oxygen concentration is higher in the gas of revealing after feeding oxygen enrichment, cause the waste of oxygen, draw a branch wind pipe line 10 on the air-supply pipeline 2 before oxygen (or oxygen enrichment) and air mixed for this reason, the top of normal air being delivered to ash hoist 13 forms sealing gland, thereby reduces the waste that causes oxygen because of ash hoist 13 leakages.The air quantity control of branch wind pipe 10 realizes by stopping valve 11.
Too high in order to prevent because of oxygen concentration, equipment, personnel are damaged, this device is provided with the multiple chain oxygen supply that stops.The high and low limit that specifically comprises oxygen (or oxygen enrichment) flow is chain, gas blower 1 operation is chain and the electric current lower bound is chain, the air quantity lower bound is chain, high limit is chain, communicating interrupt is chain, oxygen low pressure is chain, the oxygen high pressure is chain.The chain parking of the high and low limit of oxygen (or oxygen enrichment) flow relies on the oxygen flow meter 9 in the variable valve group 3 to record data, data feed back to the DCS (or PLC) outside the equipment of being arranged on, DCS and set(ting)value compare, when eligible, cut off oxygen supply immediately, when the chain parking of the high and low limit of oxygen can be avoided air flow rate table fault, the person, operation and equipment breakdown took place; Gas blower 1 operation is chain to be the auxiliary contact signal input DCS (or PLC) of electrical contact during by gas blower 1 operation, when eligible, DCS instruction variable valve group 3 is cut off oxygen supply immediately, in the time of can avoiding gas blower 1 to stop, because undesired signal or air flow rate table fault are accidents caused; The electric current lower bound is chain also to be by DCS gas blower 1 running current data and set(ting)value to be compared, when eligible, DCS instruction variable valve group 3 is cut off oxygen supply immediately, can avoid gas blower 1 master loop to stop and during gas blower 1 operation the auxiliary contact of electrical contact be failure to actuate and cause the accident; The data that the chain dependence oxygen flow meter 9 of chain, the high limit of air quantity lower bound records realize that the high lower bound of the similar oxygen flow of principle is reported to the police; The high and low pressure switch of the oxygen of installing in the chain dependence variable valve of the oxygen high and low pressure group 3 realizes cutting off automatically oxygen supply; Communicating interrupt is chain to be exactly to cut off oxygen supply when variable valve group 3 can not get data automatically.
Following table is comparative example's (this table data are fuel with the coke) of the utility model and prior art
| Project | Oxygen concentration (%) | Proportioning (%) | Kiln gas co 2Concentration (%) | Blower current (A) | Last stone amount (t) |
| Before the oxygenation | 21 | 7.2 | 41.0 | 282 | 34 |
| Behind the oxygenation | 22 | 6.8 | 42.9 | 245 | 34 |
| Behind the oxygenation | 23 | 6.6 | 44.8 | 234 | 35 |
By last table data as can be known: oxygen concentration improves 1%, and fuel ratio can reduce about 4%, kiln gas CO
2Concentration can improve about 4%, and under the load of identical limestone kiln, blower current descends about 13%.
If the ash hoist amount of leakage is averaged 2000m
3/ h, oxygen-rich concentration by 1% we be controlled at 1500m by branch wind pipe for air capacity
3/ h then per hour can reduce flow of oxygen 15m
3
Claims (3)
1, the oxygen-enriched combustion-supporting device in the vertical limestone kiln of a kind of batch mixing, comprise gas blower, the oxygen divider, be positioned at the DCS controller outside the device, it is characterized in that, described blower export is connected with the air-supply pipeline, on the described air-supply pipeline oxygen flow meter is installed, the inside of air-supply pipeline is equipped with the oxygen divider, the afterbody of air-supply pipeline is communicated with the air compartment that is positioned at the bottom, limestone kiln, and the oxygen therapy pipeline is provided with the air-supply pipeline with the blast tube line parallel and is connected, and this oxygen therapy pipeline is provided with the variable valve group of regulating and controlling amount of oxygen, branch wind pipe is connected with the air-supply pipeline that is positioned at oxygen divider leading portion, and the other end and ash hoist top are connected to form sealing gland.
2, the oxygen-enriched combustion-supporting device in the vertical limestone kiln of batch mixing according to claim 1 is characterized in that, on the described oxygen therapy pipeline vacuum breaker and spark arrester is installed.
3, the oxygen-enriched combustion-supporting device in the vertical limestone kiln of batch mixing according to claim 1 is characterized in that, described gas blower, variable valve group connect and compose interlock protection device with the DCS controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920152049U CN201381284Y (en) | 2009-04-24 | 2009-04-24 | Oxygen-enriched combustion supporting device of vertical mixture kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920152049U CN201381284Y (en) | 2009-04-24 | 2009-04-24 | Oxygen-enriched combustion supporting device of vertical mixture kiln |
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| Publication Number | Publication Date |
|---|---|
| CN201381284Y true CN201381284Y (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920152049U Expired - Lifetime CN201381284Y (en) | 2009-04-24 | 2009-04-24 | Oxygen-enriched combustion supporting device of vertical mixture kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681560A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Calculation method for demanded quantity of air and oxygen in smelting system |
| CN104058606A (en) * | 2014-05-31 | 2014-09-24 | 石家庄新华能源环保科技股份有限公司 | Method and device for producing lime by oxygen-enriched combustion |
| CN106595309A (en) * | 2017-01-17 | 2017-04-26 | 孔祥旭 | Sintering oxygen enrichment system |
| CN111454004A (en) * | 2020-04-23 | 2020-07-28 | 中冶南方武汉钢铁设计研究院有限公司 | Double-chamber lime kiln |
-
2009
- 2009-04-24 CN CN200920152049U patent/CN201381284Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681560A (en) * | 2011-03-10 | 2012-09-19 | 中国恩菲工程技术有限公司 | Calculation method for demanded quantity of air and oxygen in smelting system |
| CN104058606A (en) * | 2014-05-31 | 2014-09-24 | 石家庄新华能源环保科技股份有限公司 | Method and device for producing lime by oxygen-enriched combustion |
| CN104058606B (en) * | 2014-05-31 | 2016-08-24 | 石家庄新华能源环保科技股份有限公司 | Oxygen-enriched combusting produces the method and apparatus of lime |
| CN106595309A (en) * | 2017-01-17 | 2017-04-26 | 孔祥旭 | Sintering oxygen enrichment system |
| CN111454004A (en) * | 2020-04-23 | 2020-07-28 | 中冶南方武汉钢铁设计研究院有限公司 | Double-chamber lime kiln |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100113 |
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| CX01 | Expiry of patent term |