CN207730037U - A kind of cement kiln end band denitration classified utilization residual heat system - Google Patents
A kind of cement kiln end band denitration classified utilization residual heat system Download PDFInfo
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- CN207730037U CN207730037U CN201820007286.XU CN201820007286U CN207730037U CN 207730037 U CN207730037 U CN 207730037U CN 201820007286 U CN201820007286 U CN 201820007286U CN 207730037 U CN207730037 U CN 207730037U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Disclosed by the utility model is a kind of cement kiln end band denitration classified utilization residual heat system, kiln tail preheater including being sequentially communicated setting, waste heat boiler, drying raw meal device, bag filter, the out of stock device of low temperature, it further include low-temperature hot-water boiler, the out of stock device outlet flue of low temperature is connected to low-temperature hot-water boiler smoke inlet, low-temperature hot-water boiler outlet flue is in communication with the outside, it is provided with heat in low-temperature hot-water boiler and changes pipeline, heat changes the import of pipeline, outlet is connected separately with water sending device, vapor power generator, vapor power generator water outlet is connect with water sending device water inlet, the utility model can reduce influence of the denitrating system to former residual heat generating efficiency, meet the system requirements of higher denitration efficiency, woth no need to arrange soot cleaning system in boiler, it is compact-sized, cost is lower, energy utilization rate is high.
Description
Technical field
Residual heat system is utilized the utility model is related to a kind of, is more specifically said, a kind of cement kiln end band denitration point is related to
Grade utilizes residual heat system.
Background technology
Currently, China's dry-process cement rotary kiln production line common configuration has low-temperature waste heat power generation system, to useless in manufacture of cement
Heat is recycled, as the requirement to environmental protection improves, newest promulgation《Cement industry Air Pollutant Emission mark
It is accurate》It is provided in GB4915-2013：From newly-built 1 day March in 2014 of enterprise, from 1 day July in 2015 of existing enterprise, kiln tail is executed
NOx emission concentration is not more than the regulation of 400mg/Nm3, and key area executes the rule that NOx emission concentration is not more than 320mg/Nm3
Fixed, cement production enterprise raw emissions cannot meet environmental requirement, it is therefore necessary to which mating denitration device can be only achieved discharge index.
Currently, the most widely used gas denitrifying technology of cement production enterprise is selective non-catalytic reduction technology (SNCR), take off
Nitre efficiency is generally 50-75%, and the suitable temperature range of conversion zone is 850-1050 DEG C, can generally meet current environmental protection
The requirement of index, if discharge index, which further increases, can reach 250mg/Nm3 emission requests below, selection used at present
Property non-catalytic reduction technology (SNCR) cannot meet discharge index, denitration technology the selecting property catalytic reduction technique of another mainstream
(SCR), denitration efficiency is generally 70-90%, and there are two types of the suitable temperature ranges of conversion zone, and one kind is 350-400 DEG C, another
Kind newer technology temperature range is 150-200 DEG C, thus in order to meet lower discharge index need to select it is more efficient
SCR technology (SCR), even two kinds of denitration technologies are applied in combination.
The temperature range of cement production enterprise kiln tail UTILIZATION OF VESIDUAL HEAT IN is generally 300-350 DEG C, and current UTILIZATION OF VESIDUAL HEAT IN is logical
It crosses configuration waste heat boiler and temperature of flue gas in kiln is down to 180-220 DEG C, the flue gas of waste heat boiler discharge goes drying raw meal system pair
Raw material are dried, and flue gas out is arranged by chimney to air after 110-140 DEG C, dedusting, if using selective catalysis
Reduction technique (SCR) carries out denitration to flue gas, needs to find rational 150-200 DEG C of Applicable temperature section, it is therefore necessary to will show
Some waste heat boilers are transformed, and exhaust gas temperature is carried to 250 DEG C or so, then go drying raw meal system, pass through dedusting in this way
Clean flue-gas temperature meets low-temperature selective catalytic reduction technology (SCR) scope of application at 180 DEG C or so, can reach ideal
Denitration efficiency, but the exhaust gas temperature of waste heat boiler is carried from 200 DEG C or so to 250 DEG C or so, necessarily entire waste heat is sent out
The efficiency of electric system has a huge impact, and will make the lower power production 22% or so of entire electricity generation system through calculating, although ring
The problem of protecting discharge index solves, but really the economic benefit of cement production enterprise is made to have dropped.
Utility model content
Utility model aims to solve above-mentioned problems, right by using the method for classified utilization waste heat
Residual heat resources after low-temperature denitration further utilize, to reduce due to using the denitration technology of higher efficiency to utilization rate of waste heat
Influence.
To achieve the goals above, the utility model is achieved through the following technical solutions：
A kind of cement kiln end band denitration classified utilization residual heat system, including it is sequentially communicated the kiln tail preheater of setting, waste heat
Boiler, drying raw meal device, bag filter, the out of stock device of low temperature, further include low-temperature hot-water boiler, the out of stock device of low temperature
Outlet flue is connected to low-temperature hot-water boiler smoke inlet, and the low-temperature hot-water boiler outlet flue is in communication with the outside, in Low Temperature Thermal kettle
It is provided with heat in stove and changes pipeline, the heat changes the import of pipeline, outlet is connected separately with water sending device, vapor power generator,
The vapor power generator water outlet is connect with water sending device water inlet.
As an improvement air hose is connected between the waste heat boiler and kiln tail preheater, it is movable on the air hose
Cigarette windshield plate door is provided with to adjust air hose flue gas circulation.
As an improvement high-temperature blower is connected between the waste heat boiler and drying raw meal device, the high-temperature blower
Return air temperature is 170-200 DEG C.
As an improvement it is spiral extended surface tube that the heat, which changes pipeline,.
As an improvement the outlet of the extended surface tube includes water outlet, gas outlet, the water outlet is connected with supplying hot water
Pipe, the gas outlet is connect with vapor power generator.
As an improvement the heat supply water pipe water outlet is connect with water sending device water inlet.
As an improvement the water sending device water outlet water temperature is 50-70 DEG C.
As an improvement the extended surface tube water outlet water temperature is 90-100 DEG C.
As an improvement steam temperature is 150-180 DEG C at the extended surface tube gas outlet.
As an improvement the kiln tail preheater outlet flue temperature is 300-350 DEG C, the waste heat boiler outlet flue temperature
Degree is 240-260 DEG C, and the out of stock device outlet flue temperature of low temperature is 150-180 DEG C.
Advantageous effect：Influence of the denitrating system to former residual heat generating efficiency can be reduced, higher denitration efficiency can be met
System requirements；Low-temperature denitration device is set after bag filter, can not only reach rational reaction interval, but also can solve
The problem of flue dust blocking catalyst；After low-temperature hot-water boiler is arranged in bag filter, the flue gas after dedusting is cleaner, is not required to
Soot cleaning system is arranged in boiler；The heat exchange pipeline of low-temperature hot-water boiler uses spiral finned tube, increases extended surface,
The heating surface area of unit area increases by 7 times；Structure is compacter, and cost is lower；Low-temperature hot-water boiler takes up little area, compact-sized；
At low cost, energy utilization rate is high.
Description of the drawings
Fig. 1 is the utility model overall structure diagram.
Specific implementation mode
Below in conjunction with Figure of description, the utility model is described in further detail, but the utility model be not limited to
Lower embodiment.
Embodiment 1
As shown in Figure 1, a kind of cement kiln end band denitration classified utilization residual heat system, including be sequentially communicated setting kiln tail it is pre-
The out of stock device 5 of hot device 1, waste heat boiler 2, drying raw meal device 3, bag filter 4, low temperature, 1 outlet flue flue gas of kiln tail preheater
Temperature is 300-350 DEG C, is connected by air hose 10 between waste heat boiler 2 and kiln tail preheater 1, the cigarette of movable setting on air hose 10
Windshield plate door 11 controls flue gas circulation to adjust 10 flue gas circulation of air hose, by adjusting 11 position of cigarette windshield plate door so that
The flue-gas temperature that waste heat boiler 2 exports is maintained at 240-260 DEG C or so, and preferably 250 DEG C of the utility model, flue gas passes through waste heat pot
After stove 2, into high-temperature blower 12, drying raw meal device 3 is then entered by air hose, for meeting manufacturing technique requirent, high temperature
Between 12 return air temperature of wind turbine is 170-200 DEG C, entered in bag filter 4 by high-temperature flue gas after drying raw meal device 3, it will
Dust in flue gas is detached, and the flue gas after dedusting enters the out of stock device 5 of low temperature, uses SCR technology
(SCR) denitration is carried out to flue gas, the flue-gas temperature being discharged after reaction is 150 DEG C -180 DEG C, and flue gas is passed into low-temperature water heating
Boiler 6 is provided with heat in low-temperature hot-water boiler 6 and changes pipeline 7, and it is spiral extended surface tube that heat, which changes pipeline 7, at this point, by sending
Water installations 8 are passed through 50-70 DEG C of water in extended surface tube, and the water in extended surface tube carries out heat exchange, extended surface tube water outlet stream with flue gas
Hot water is delivered for user by heat supply water pipe 13 and uses and (be used as caliduct), by using by the hot water for going out 90-100 DEG C
Water after cooling is sent to by 13 water outlet of heat supply water pipe in water sending device 8, and the water in water sending device 8 is sent in extended surface tube again,
A circulating heat supply system is formed, is discharged in air by outlet flue by the flue gas of low-temperature hot-water boiler 6.
By taking the kiln tail afterheat utilizing system of a 5000t/d cement producing line as an example, more than low-temperature denitration classified utilization
After hot systems, thermal energy 7632kW can be additionally recycled, economic benefit is considerable.
Embodiment 2
As shown in Figure 1, a kind of cement kiln end band denitration classified utilization residual heat system, including be sequentially communicated setting kiln tail it is pre-
The out of stock device 5 of hot device 1, waste heat boiler 2, drying raw meal device 3, bag filter 4, low temperature, 1 outlet flue flue gas of kiln tail preheater
Temperature is 300-350 DEG C, is connected by air hose 10 between waste heat boiler 2 and kiln tail preheater 1, the cigarette of movable setting on air hose 10
Windshield plate door 11 controls flue gas circulation to adjust 10 flue gas circulation of air hose, by adjusting 11 position of cigarette windshield plate door so that
The flue-gas temperature that waste heat boiler 2 exports is maintained at 240-260 DEG C or so, and preferably 250 DEG C of the utility model, flue gas passes through waste heat pot
After stove 2, into high-temperature blower 12, drying raw meal device 3 is then entered by air hose, for meeting manufacturing technique requirent, high temperature
Between 12 return air temperature of wind turbine is 170-200 DEG C, entered in bag filter 4 by high-temperature flue gas after drying raw meal device 3, it will
Dust in flue gas is detached, and the flue gas after dedusting enters the out of stock device 5 of low temperature, uses SCR technology
(SCR) denitration is carried out to flue gas, the flue-gas temperature being discharged after reaction is 150 DEG C -180 DEG C, and flue gas is passed into low-temperature water heating
Boiler 6 is provided with heat in low-temperature hot-water boiler 6 and changes pipeline 7, and it is spiral extended surface tube that heat, which changes pipeline 7, at this point, by sending
Water installations 8 are passed through 50-70 DEG C of water in extended surface tube, and the water in extended surface tube carries out heat exchange, the spray of extended surface tube gas outlet with flue gas
Vapor is passed into vapor power generator 9 by the vapor for going out 150-180 DEG C, and realization converts heat energy into electric energy, this reality
It is Organic Rankine Cycle power generator with new water steam power generator 9, the vapor being passed through in vapor power generator 9 is cold
But water is formed afterwards, which is sent to by 9 water outlet of vapor power generator in water sending device 8, and the water in water sending device 8 is sent to again
In extended surface tube, a cycle generating system is formed, is discharged in air by outlet flue by the flue gas of low-temperature hot-water boiler 6.
By taking the kiln tail afterheat utilizing system of a 5000t/d cement producing line as an example, more than low-temperature denitration classified utilization
After hot systems, thermal energy 7632kW can be recycled, by Organic Rankine Cycle power generator, about 10% generated energy can be converted,
That is 763.2kW, it may have larger economic value, main is the influence for solving low-temperature denitration and being brought to cogeneration.
Finally it should be noted that the utility model is not limited to above example, there can also be many variations.This field
The those of ordinary skill's all deformations that directly can export or associate from content disclosed by the utility model, be considered as
The scope of protection of the utility model.
Claims (10)
1. a kind of cement kiln end band denitration classified utilization residual heat system, it is characterised in that：Kiln tail including being sequentially communicated setting is pre-
Hot device (1), waste heat boiler (2), drying raw meal device (3), bag filter (4), the out of stock device of low temperature (5), further include low temperature
Hot-water boiler (6), the out of stock device of low temperature (5) outlet flue are connected to low-temperature hot-water boiler (6) smoke inlet, the low-temperature water heating
Boiler (6) outlet flue is in communication with the outside, and being provided with heat in low-temperature hot-water boiler (6) changes pipeline (7), and the heat changes pipeline (7)
Import, outlet be connected separately with water sending device (8), vapor power generator (9), vapor power generator (9) water outlet
Mouth is connect with water sending device (8) water inlet.
2. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 1, it is characterised in that：It is described remaining
It is connected with air hose (10) between heat boiler (2) and kiln tail preheater (1), it is movable on the air hose (10) to be provided with cigarette windshield plate
Door (11) is to adjust air hose (10) flue gas circulation.
3. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 2, it is characterised in that：It is described remaining
High-temperature blower (12) is connected between heat boiler (2) and drying raw meal device (3), high-temperature blower (12) return air temperature is 170-
200℃。
4. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 1, it is characterised in that：The heat
It is spiral extended surface tube to change pipeline (7).
5. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 4, it is characterised in that：The fin
The outlet of piece pipe includes water outlet, gas outlet, and the water outlet is connected with heat supply water pipe (13), and the gas outlet is sent out with vapor
Electric installation (9) connects.
6. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 5, it is characterised in that：The confession
Hot-water line (13) water outlet is connect with water sending device (8) water inlet.
7. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 1 or 6, it is characterised in that：Institute
It is 50-70 DEG C to state water sending device (8) water outlet water temperature.
8. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 5, it is characterised in that：The fin
Piece pipe water outlet water temperature is 90-100 DEG C.
9. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 5, it is characterised in that：The fin
Steam temperature is 150-180 DEG C at piece pipe gas outlet.
10. a kind of cement kiln end band denitration classified utilization residual heat system according to claim 1, it is characterised in that：It is described
Kiln tail preheater (1) outlet flue temperature is 300-350 DEG C, and waste heat boiler (2) the outlet flue temperature is 240-260 DEG C, described
The out of stock device of low temperature (5) outlet flue temperature is 150-180 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820007286.XU CN207730037U (en) | 2018-01-03 | 2018-01-03 | A kind of cement kiln end band denitration classified utilization residual heat system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820007286.XU CN207730037U (en) | 2018-01-03 | 2018-01-03 | A kind of cement kiln end band denitration classified utilization residual heat system |
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| CN207730037U true CN207730037U (en) | 2018-08-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426181A (en) * | 2020-03-31 | 2020-07-17 | 自贡金龙水泥有限公司 | Drying device utilizing waste heat of steam boiler and using method thereof |
| CN111895377A (en) * | 2020-08-03 | 2020-11-06 | 黄震 | Efficient-circulation device and method for cement kiln denitration |
| CN112387112A (en) * | 2020-12-03 | 2021-02-23 | 北京高能时代环境技术股份有限公司 | Drying flue gas treatment system and method |
-
2018
- 2018-01-03 CN CN201820007286.XU patent/CN207730037U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426181A (en) * | 2020-03-31 | 2020-07-17 | 自贡金龙水泥有限公司 | Drying device utilizing waste heat of steam boiler and using method thereof |
| CN111895377A (en) * | 2020-08-03 | 2020-11-06 | 黄震 | Efficient-circulation device and method for cement kiln denitration |
| CN112387112A (en) * | 2020-12-03 | 2021-02-23 | 北京高能时代环境技术股份有限公司 | Drying flue gas treatment system and method |
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