CN203810400U - Environment-friendly type oxygen-enriched combustion device applicable to cement kiln - Google Patents
Environment-friendly type oxygen-enriched combustion device applicable to cement kiln Download PDFInfo
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- CN203810400U CN203810400U CN201420148107.6U CN201420148107U CN203810400U CN 203810400 U CN203810400 U CN 203810400U CN 201420148107 U CN201420148107 U CN 201420148107U CN 203810400 U CN203810400 U CN 203810400U
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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 relates to an environment-friendly type oxygen-enriched combustion device applicable to a cement kiln and belongs to the field of a dry method cement production technology. The environment-friendly type oxygen-enriched combustion device applicable to the cement kiln is characterized in that the environment-friendly type oxygen-enriched combustion device applicable to the cement kiln comprises an air filter, a centrifugal fan, a membrane separator, a vacuum pump, a stable-pressure buffering tank and a connection pipeline, wherein the air filter is connected with the membrane separator through the centrifugal fan; the membrane separator is connected with the vacuum pump; the vacuum pump is communicated with three paths of pipelines; the first-path pipeline passes through the air cooler and is communicated with a kiln head coal gas pipeline; the second-path pipeline passes through a primary fan and is communicated with a kiln head air purification pipeline; the third-path pipeline passes through a decomposing furnace grading combustion and denitration pipe and is communicated with a decomposing furnace. According to the environment-friendly type oxygen-enriched combustion device, the NOx emission concentration of the cement kiln can be effectively reduced and the complete combustion degree of coal powder is improved; the environment-friendly effects of saving energy and reducing consumption, and reducing the NOx emission concentration are realized.
Description
Technical field
The utility model belongs to cement produced with the dry method production technical field, particularly relates to a kind of environment-friendly type oxygen-enriched burning device that is applicable to cement kiln.
Background technology
At present, in cement industry, some European and American developed countries have carried out long-term deep research to cement kiln oxygen-enriched combustion technology, and the U.S. cement plants such as all like Lafarge Corporation-Alpena have installed oxygen-enriched combustion-supporting equipment additional; Domesticly emerge in large numbers large quantities of outstanding oxygen generating plant manufacturers and be applied on more domestic cement producing lines.
The requirement that new dry process for cement production is certain to being designed with of raw coal, general calcined by rotary kiln coal quality requirement: ash content A
d<27%, volatile matter V
daf>25%, caloric value Q
net,
ar>21000kJ/kg.But on a lot of production lines, because former pit ash is too high, calorific value is too low, often cause the series of problems such as imperfect combustion of fuel, have a strong impact on the energy consumption level in grog production process.For the new technology of New Type Dry-process Cement Production, add respectively oxygen-enriched air to promote the abundant burning of fuel at decomposition furnace system and rotary system, thermal regulation and the raising cement quality of stablizing whole kiln system are applied in some cement production enterprises as the main flow scheme of cement kiln oxygen-enriched combusting.
But Current Domestic is outer for mostly the resting in the coal consumption that reduces unit grog how of cement kiln oxygen-enriched combustion technology, does not substantially relate to and reduces NO
xconcentration of emission.Although therefore obtained certain effect aspect energy-conservation after good multiple production line installs oxygen-enriched combustion-supporting equipment additional, reduced NO
xconcentration of emission, especially reducing the NO producing in dore furnace
xconcentration does not obtain good effect, has on the contrary increase to a certain degree on some production lines, has produced NO
xthe environmental protection new problem that discharge causes.
Summary of the invention
The utility model provides a kind of environment-friendly type oxygen-enriched burning device that is applicable to cement kiln for solving the technical problem existing in known technology.
The utility model, according to the feature of new type nonaqueous cement production line, passes into stable oxygen-enriched air in the relevant position of rotary kiln and dore furnace, reaches energy-saving and cost-reducing and reduces NO
xthe object of concentration of emission.The purpose of this utility model is to reduce unit grog coal consumption, can reduces NO again
xthe cement kiln environment-friendly type oxygen-enriched combusting method based on embrane method oxygen of concentration of emission.
The purpose of this utility model is to provide one and has simple in structurely, easy to operate, can effectively reduce cement kiln and particularly use the NO of colm cement kiln
xthe completing combustion degree of concentration of emission and raising cement kiln coal dust, thus reach energy-saving and cost-reducing and reduce NO
xthe environment-friendly type oxygen-enriched burning device that is applicable to cement kiln of the features such as the environment protecting of concentration of emission.
The utility model is applicable to the technical scheme that the environment-friendly type oxygen-enriched burning device of cement kiln takes:
An environment-friendly type oxygen-enriched burning device that is applicable to cement kiln, is characterized in: the environment-friendly type oxygen-enriched burning device that is applicable to cement kiln comprises air cleaner, centrifugal blower, membrane separator, vavuum pump, voltage stabilizing surge tank and connecting pipe; Air cleaner is by centrifugal blower junctional membrane separator, membrane separator connects vavuum pump, vavuum pump is communicated with three-way connection (pipe) road, first via device for cleaning pipeline is communicated with kiln hood coal wind pipeline after crossing aerial cooler, the second road device for cleaning pipeline is crossed primary air fan and is communicated with kiln hood clean wind pipe road, and Third Road device for cleaning pipeline is crossed dore furnace fractional combustion denitration pipe and is communicated with dore furnace.
The utility model is applicable to the environment-friendly type oxygen-enriched burning device of cement kiln can also take following technical measures:
The described environment-friendly type oxygen-enriched burning device that is applicable to cement kiln, is characterized in: vavuum pump is dry type Roots vaccum pump, and dry type Roots vaccum pump provides negative pressure for membrane separator.
The described environment-friendly type oxygen-enriched burning device that is applicable to cement kiln, is characterized in: the quantity of membrane separator is 2-6 group, and every group of membrane separator installed respectively gate valve, and the gate valve that purging pipeline and exhausting pipeline adopt is electric control valve.
The described environment-friendly type oxygen-enriched burning device that is applicable to cement kiln, is characterized in: three-way connection (pipe) road is all equipped with control valve, first via device for cleaning pipeline is crossed aerial cooler and first entered voltage stabilizing surge tank, is then communicated with kiln hood coal wind pipeline; The second road device for cleaning pipeline is crossed after voltage stabilizing surge tank and is communicated with kiln hood clean wind pipe road with primary air fan.
The invention provides a kind of NO that can effectively reduce cement kiln and particularly use colm cement kiln that has
xthe completing combustion degree of concentration of emission and raising cement kiln coal dust, thus reach energy-saving and cost-reducing and reduce NO
xthe environment protecting of concentration of emission, can realize the environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln of the features such as heat recovery and utilization.
The present invention is applicable to the technical scheme that the environment-friendly type oxygen-enriched combusting method of cement kiln takes:
An environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, is characterized in: the environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln comprises following processing step:
(1) prepare oxygen-enriched air
Adopt embrane method oxygen mode, use membrane separator to produce oxygen-enriched air;
(2) oxygen-enriched combustion-supporting
The oxygen-enriched air of preparation divides three parts to carry out oxygen-enriched combustion-supporting, and the first via enters kiln hood coal wind pipeline after by aerial cooler, and kiln hood clean wind pipe road is sent into by primary air fan in the second tunnel, and Third Road is sent into dore furnace by dore furnace fractional combustion denitration pipe.
The present invention is applicable to the environment-friendly type oxygen-enriched combusting method of cement kiln can also take following technical measures:
The described environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, is characterized in: when embrane method oxygen, the cleaned air after filtration is sent into the oxygen-enriched air of membrane separator generation 25-30% by centrifugal blower.
The described environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, is characterized in: when embrane method oxygen, the negative pressure of membrane separator is provided by dry type Roots vaccum pump, and outlet oxygen-enriched air temperature is 110-150 DEG C.
The described environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, be characterized in: when oxygen-enriched air three parts are carried out oxygen-enriched combustion-supporting, the first via enters kiln hood coal wind pipeline, the second tunnel and sends into kiln hood clean wind pipe road, Third Road to send into the volume ratio of the oxygen-enriched air of dore furnace be 1:1-3:2-3, and the primary zone coefficient of excess air of dore furnace is 0.5-0.9.
The described environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, is characterized in: when oxygen-enriched air three parts are carried out oxygen-enriched combustion-supporting, the flow on each road adopts manual modulation valve to regulate.
The described environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, is characterized in: first via oxygen-enriched air enters voltage stabilizing surge tank after being down to 50-90 DEG C by aerial cooler, then sends into kiln hood coal wind pipeline; The second road oxygen rich gas is sent in kiln hood clean wind pipe road with primary air fan after by voltage stabilizing surge tank.
Advantage and good effect that the present invention has are:
Be applicable to the environment-friendly type oxygen-enriched burning device of cement kiln owing to having adopted the technical scheme that the utility model is brand-new, compared with prior art, the present invention can effectively reduce cement kiln and particularly use the NO of colm cement kiln
xthe completing combustion degree of concentration of emission and raising cement kiln coal dust, thus reach energy-saving and cost-reducing and reduce NO
xthe environment protecting of concentration of emission.In addition, the utility model device takes full advantage of the part heat consuming in oxygen preparation, has realized the recycling of heat.After the power consumption that the utility model deduction low-purity oxygen plant produces, clean coal saving rate at least more than 3%, NO
xdischarge capacity reduce more than 30%, there is obvious good effect.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model is applicable to the environment-friendly type oxygen-enriched burning device of cement kiln.
In figure, 1. air cleaner, 2. centrifugal blower, 3. hand-operated valve, 4. hand-operated valve, 5. centrifugal blower, 6. hand-operated valve, 7. hand-operated valve, 8. membrane separator, 9. motor-driven valve, 10. control valve, 11. dry type Roots vaccum pumps, 12. atmospheric valves, 13. electric control valves, 14. electric control valves, 15. denitration pipes, 16. control valves, 17. surge tanks, 18. control valves, 19. air-cooled heat exchangers, 20. surge tanks, 21. coal wind pipelines, 22. clean wind pipe roads, 23. control valves, 24. control valves.
Detailed description of the invention
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and be described with reference to the accompanying drawings as follows:
With reference to accompanying drawing 1.
Embodiment 1
Be applicable to an environment-friendly type oxygen-enriched burning device for cement kiln, comprise air cleaner 1, centrifugal blower 2 and centrifugal blower 5, membrane separator 8, dry type Roots vaccum pump 11, voltage stabilizing surge tank and connecting pipe.The quantity of membrane separator 8 is 4 groups, and every group of membrane separator installed respectively gate valve, and the gate valve that purging pipeline and exhausting pipeline adopt is electric control valve.Air cleaner is by centrifugal blower junctional membrane separator 8, and membrane separator 8 connects dry type Roots vaccum pump 11, and dry type Roots vaccum pump 11 provides negative pressure for membrane separator 8.Dry type Roots vaccum pump 8 is communicated with three-way connection (pipe) road, and three-way connection (pipe) road is all equipped with manual modulation valve and carries out flow assignment adjusting.First via device for cleaning pipeline is crossed aerial cooler and is first entered voltage stabilizing surge tank 20, is then communicated with kiln hood coal wind pipeline 21; It is rear with primary air fan connection kiln hood clean wind pipe road 22 that the second road device for cleaning pipeline is crossed voltage stabilizing surge tank 17; Third Road device for cleaning pipeline is crossed dore furnace fractional combustion denitration pipe 15 and is communicated with dore furnace.
Embodiment 2
An environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln, is characterized in: the environment-friendly type oxygen-enriched combusting method that is applicable to cement kiln comprises following processing step:
1. prepare oxygen-enriched air
Adopt embrane method oxygen mode, use membrane separator to produce oxygen-enriched air; When embrane method oxygen, the cleaned air after filtration is sent into membrane separator by centrifugal blower, and the negative pressure of separator is provided by dry type Roots vaccum pump.Cleaned air after filtration produces 27 ± 1% oxygen-enriched air by centrifugal blower approaching after sending into membrane separator under atmospheric pressure state, and the oxygen-enriched air temperature of outlet oxygen content 27 ± 1% is 130 DEG C of left and right.
2. oxygen-enriched combustion-supporting
The oxygen-enriched air of preparation divides three parts to carry out oxygen-enriched combustion-supporting, and the flow on each road adopts manual modulation valve to regulate.First via oxygen-enriched air enters voltage stabilizing surge tank after being down to 50-90 DEG C by aerial cooler, then sends into kiln hood coal wind pipeline; The second road oxygen rich gas is sent in kiln hood clean wind pipe road with primary air fan after by voltage stabilizing surge tank; Third Road is sent into dore furnace by dore furnace fractional combustion denitration pipe.When oxygen-enriched air three parts are carried out oxygen-enriched combustion-supporting, the first via enters kiln hood coal wind pipeline, the second tunnel and sends into kiln hood clean wind pipe road, Third Road to send into the volume ratio of the oxygen-enriched air of dore furnace be 1:1-3:2-3.
The concrete structure of the present embodiment and implementation process:
An environment-friendly type oxygen-enriched burning device that is applicable to cement kiln, can reduce NO
xdischarge, reduces unit grog coal consumption.The utility model is by high-performance, lower resistance air cleaner 1, centrifugal blower 2, centrifugal blower 5, detect with hand-operated valve 3, detect with hand-operated valve 4, detect with hand-operated valve 6, detect with hand-operated valve 7, membrane module 8, purge with motor-driven valve 9, flow control valve 10, flow control valve 16, flow control valve 18, flow control valve 23 and flow control valve 24, dry type Roots vaccum pump 11, atmospheric valve 12, electric control valve 14, denitrogenation pipe 15, air-cooled heat exchanger 19, oxygen-enriched air surge tank 17 and oxygen-enriched air surge tank 20 and conveyance conduit composition.Wherein, above-mentioned air cleaner is washing filter or better other type filter of filter effect, gas between filter and film is carried and is adopted centrifugal blower to complete, the pressure energy that this centrifugal blower provides is wanted to overcome the resistance of conveyance conduit, and passes in membrane module to approach atmospheric pressure.Above-mentioned oxygen-enriching device outlet is divided into 3 branch roads, and the first via enters coal powder in kiln head passage after lowering the temperature, and the second tunnel passes into kiln hood clean wind pipe road, and Third Road passes in dore furnace by denitrogenation pipe.
Experiment shows, the NO that volatile matter forms is fuel type NO
xchief component, fundamental sum coal dust volatile matter discharges burning synchronously to carry out, and appears at the position very near apart from coal burner.Therefore, by changing operating condition, control the mixability of coal dust at flame initial stage and air, just can well control volatile matter NO
xformation.Because the concentration of oxygen and the burning of coal dust have very large relation, in unit volume, oxygen concentration is higher, and the tail-off time of fuel is shorter, burns more abundant.The utility model utilizes the feature of above-mentioned coal dust firing, adopts following mode:
1. air is by after filter, and clean air enters membrane separator by centrifugal blower, and in membrane separator, the negative pressure (approximately-50KPa) being produced by dry type Roots vaccum pump is isolated 27 ± 1% oxygen-enriched air in film system.
2. the oxygen-enriched air producing forms three branch roads.The first via is sent into coal powder in kiln head burner by kiln hood coal wind blower fan.Because the negative pressure of embrane method oxygen generation system is produced by dry vacuum pump, the temperature of the oxygen rich gas therefore producing is 130 DEG C of left and right.And in the course of conveying of coal dust, too high air themperature can cause the detonation of coal dust.Therefore,, before passing into coal dust passage, installed an aerial cooler additional at this branch road.Through aerial cooler, the temperature of oxygen rich gas reaches coal dust carry and require after, replace the former kiln hood wind of delivering coal with oxygen-enriched air.In the time of the pressure overpressure container maximum pressure limit of vacuum tank, air bleeding valve is opened automatically, maintains the operation of vacuum tank safety and steady.
3. the high-temperature oxygen-enriched air on the second tunnel, by after the pressure stabilization function of vacuum tank, is sent in kiln hood burner by a roots blower.Similar step 2, in the time of the pressure overpressure container maximum pressure limit of vacuum tank, air bleeding valve is opened automatically, maintains the operation of vacuum tank safety and steady.
4. the high-temperature oxygen-enriched air of Third Road is by dore furnace Researched of Air Staging Combustion Burning Pulverized Coal denitration pipe, directly pass in dore furnace, by the adjusting of tertiary-air pipe and denitration sluice valve, make the primary zone coefficient of excess air of dore furnace in 0.7 left and right, make primary zone in " fuel-rich combustion " state, and ensureing that the fuel time of staying in reduced zone is 0.4-1.4s left and right, the air-flow time of staying is in 0.1-0.3s left and right.Impel fuel first under the oxidizing combustible condition of anoxic, to burn, the NO that utilizes the reproducibility intermediate product reduction part forming in partial combustion process to form
x, and suppress NO by the control of combustion atmosphere
xgeneration.Flue gas further fills into oxygen-enriched air after reacting by reducing zone, thereby has improved the completing combustion degree of coal dust in stove.Be issued to and reduce NO in the situation that does not increase heat size like this
xdischarge, energy-saving and cost-reducing object.
The present embodiment can reduce cement kiln and particularly use the NO of colm cement kiln effectively
xthe completing combustion degree of concentration of emission and raising cement kiln coal dust, thus reach energy-saving and cost-reducing and reduce NO
xthe environment protecting of concentration of emission.This process makes full use the part heat consuming in oxygen preparation, realized the recycling of heat, there are described various good effects.
Claims (4)
1. an environment-friendly type oxygen-enriched burning device that is applicable to cement kiln, is characterized in that: the environment-friendly type oxygen-enriched burning device that is applicable to cement kiln comprises air cleaner, centrifugal blower, membrane separator, vavuum pump, voltage stabilizing surge tank and connecting pipe; Air cleaner is by centrifugal blower junctional membrane separator, membrane separator connects vavuum pump, vavuum pump is communicated with three-way connection (pipe) road, first via device for cleaning pipeline is communicated with kiln hood coal wind pipeline after crossing aerial cooler, the second road device for cleaning pipeline is crossed primary air fan and is communicated with kiln hood clean wind pipe road, and Third Road device for cleaning pipeline is crossed dore furnace fractional combustion denitration pipe and is communicated with dore furnace.
2. the environment-friendly type oxygen-enriched burning device that is applicable to cement kiln according to claim 1, is characterized in that: vavuum pump is dry type Roots vaccum pump, and dry type Roots vaccum pump provides negative pressure for membrane separator.
3. the environment-friendly type oxygen-enriched burning device that is applicable to cement kiln according to claim 1, is characterized in that: the quantity of membrane separator is 2-6 group, every group of membrane separator installed respectively gate valve, and the gate valve that purging pipeline and exhausting pipeline adopt is electric control valve.
4. according to the environment-friendly type oxygen-enriched burning device that is applicable to cement kiln described in claim 1,2 or 3, it is characterized in that: three-way connection (pipe) road is all equipped with control valve, first via device for cleaning pipeline is crossed aerial cooler and is first entered voltage stabilizing surge tank, is then communicated with kiln hood coal wind pipeline; The second road device for cleaning pipeline is crossed after voltage stabilizing surge tank and is communicated with kiln hood clean wind pipe road with primary air fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420148107.6U CN203810400U (en) | 2014-03-28 | 2014-03-28 | Environment-friendly type oxygen-enriched combustion device applicable to cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420148107.6U CN203810400U (en) | 2014-03-28 | 2014-03-28 | Environment-friendly type oxygen-enriched combustion device applicable to cement kiln |
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| Publication Number | Publication Date |
|---|---|
| CN203810400U true CN203810400U (en) | 2014-09-03 |
Family
ID=51449144
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|---|---|---|---|
| CN201420148107.6U Withdrawn - After Issue CN203810400U (en) | 2014-03-28 | 2014-03-28 | Environment-friendly type oxygen-enriched combustion device applicable to cement kiln |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868061A (en) * | 2014-03-28 | 2014-06-18 | 中材装备集团有限公司 | Environment-friendly oxygen-enriched combustion method applied to cement kiln and device thereof |
| CN104197696A (en) * | 2014-09-11 | 2014-12-10 | 烟台九州环保节能科技有限公司 | Oxygen-enriched combustion-supporting and pulverized coal pure-oxygen compensation energy conservation system of rotary kiln |
-
2014
- 2014-03-28 CN CN201420148107.6U patent/CN203810400U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868061A (en) * | 2014-03-28 | 2014-06-18 | 中材装备集团有限公司 | Environment-friendly oxygen-enriched combustion method applied to cement kiln and device thereof |
| CN103868061B (en) * | 2014-03-28 | 2015-06-24 | 中材装备集团有限公司 | Environment-friendly oxygen-enriched combustion method applied to cement kiln and device thereof |
| CN104197696A (en) * | 2014-09-11 | 2014-12-10 | 烟台九州环保节能科技有限公司 | Oxygen-enriched combustion-supporting and pulverized coal pure-oxygen compensation energy conservation system of rotary kiln |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20150624 |
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| RGAV | Abandon patent right to avoid regrant |