CN101279191A - Method for purifying flue gas of refuse burning - Google Patents
Method for purifying flue gas of refuse burning Download PDFInfo
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- CN101279191A CN101279191A CNA2008100645754A CN200810064575A CN101279191A CN 101279191 A CN101279191 A CN 101279191A CN A2008100645754 A CNA2008100645754 A CN A2008100645754A CN 200810064575 A CN200810064575 A CN 200810064575A CN 101279191 A CN101279191 A CN 101279191A
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- flue gas
- purifying
- shaft kiln
- incineration
- refuse burning
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Abstract
The invention provides a method for purifying flue gas caused by garbage incineration, which relates to a method for purifying incineration flue gas. The method of the invention solves the problems of more steps of purification, large investment of treating devices, high operation cost, high energy consumption, low heat energy utilization rate existing in the existing method for purifying flue gas caused by garbage incineration. The purifying method of the invention comprises the steps: step one: incinerating; step two: introducing incineration flue gas into a cement raw mill; step three: removing dust; step four: secondary incinerating in a vertical kiln; step five: secondary incinerating and flue gas dust removing. The method of the invention saves the purifying device of acidity gas and quench step in the prior art, reduces purification process steps and operation energy consumption; by utilizing cement production devices to treat garbage incineration flue gas, the method of the invention can not only reduce investment of treatment devices and the costs of purification operation and cement production, but also remarkably improve utilization rate of incineration heat energy. By adopting the method of the invention to treat living garbage, the discharged gas is superior to national standard without affecting the quality of the prepared cement products.
Description
Technical field
The present invention relates to a kind of method that purifies incineration flue gas.
Background technology
The problem of the maximum that incineration treatment of garbage exists is exactly to burn in the flue gas that is produced to contain a large amount of poisonous, pernicious gas, serious harm environment and human body with health, (dioxin is difficult to degraded at occurring in nature and eliminates, can accumulate in vivo the dioxin that particularly waste incineration produced, its toxicity is very big, be 130 times of cyanide, be 900 times of arsenic, be listed in human one-level carcinogenic substance).At present the method for the purifying flue gas of refuse burning that adopts exists that the purified treatment step is many, complicated operation, treatment facility have high input, operating cost height, energy consumption height, burn that the heat energy utilization rate is low to reach poisonous, pernicious gas, the particularly low problem of foul gas clearance in the flue gas.
Summary of the invention
The objective of the invention is for the method that solves present purifying flue gas of refuse burning exists that the purified treatment step is many, complicated operation, treatment facility have high input, operating cost height, energy consumption height, burn poisonous, pernicious gas in the low and flue gas of heat energy utilization rate, the low problem of foul gas clearance particularly, and the method for a kind of purifying flue gas of refuse burning that provides.
The method of purifying flue gas of refuse burning of the present invention is implemented according to the following steps: one, house refuse is dropped in the incinerator and burn; Two, incineration flue gas feeds the cement slurry grinding machine, and the cement raw meal mill built-in temperature is not less than 65 ℃; Three, the flue gas ash removal that raw mill is discharged; Four, the flue gas after the dedusting is sent into the burning of cement roasting shaft kiln secondary: secondary burns the air that is fed in the shaft kiln must be through The pre-heat treatment, and the air excess amount is 140%～200%; Five, secondary incineration flue gas dedusting can enter atmosphere; Wherein the temperature in the shaft kiln is 1100～1700 ℃ in the step 4, and the air themperature after The pre-heat treatment is not less than 150 ℃, and the time of staying of the flue gas after the dedusting in shaft kiln is at least 2s.
Because the formation and the character complexity of house refuse, therefore often contain acidic gaseous pollutants such as hydrogen chloride, hydrogen fluoride, sulfur dioxide, nitrogen oxide in the flue gas that produces after the waste incineration, and heavy metal contaminants such as unburned hydrocarbons, dioxin, furans and mercury, cadmium, lead.The inventive method step 2 is utilized the acidic gaseous pollutant reaction in alkaline matter (as: calcium hydroxide) in the cement slurry and basic anhydride (as: calcium oxide, magnesia, aluminium oxide etc.) and the flue gas, and the acidic gaseous pollutant removal in the flue gas is fallen; Cement slurry in the step 2 cement slurry grinding machine is along with the rotation of grinding machine constantly is raised and leaves, make cement slurry in grinding machine inner suspension and dispersion, fully contact with flue gas of refuse burning, thereby reach the purpose of removing the acidic gaseous pollutant, simultaneously a large amount of heavy metal in the adsorbable flue gas of refuse burning of cement slurry.For the common cement slurry of the mill efficiency that improves the cement slurry grinding machine needs drying in grinding process, utilize the dry cement slurry of heat of flue gas of refuse burning among the present invention, when having saved the energy, having improved mill efficiency, improved the utilization rate of resource again.
Incineration flue gas of the present invention fully contacts the effect of having played depickling (mainly being that sour gas such as hydrogen chloride, hydrogen fluoride, sulfur dioxide, nitrogen oxide are removed) and having removed heavy metal with cement slurry, therefore it is extremely low to enter predecessor (chloride, fluoride and the complicated organic matter) concentration that can generate dioxin in the flue gas that cement roasting shaft kiln secondary burns, and effectively controls the regeneration of dioxin.The shaft kiln secondary burns and can make unburnt organic pollution fully burning (1400～1700 ℃) in shaft kiln in the flue gas in the inventive method step 4, reduces and pollutes.The humidogene pelletizing (wet stock) of cement roasting shaft kiln stage casing and epimere can adsorb and in and the sour gas and the heavy metal of remaining in the flue gas (remaining after the inventive method step 3), therefore can further purify the pollutant in the flue gas, effectively control waste incineration produced pollution thing particularly reduces the generation of dioxin.
The inventive method has been saved chilling link and acid gas purifying device in the existing technology, has reduced purified treatment step and operation energy consumption; Operate more simple; Utilize cement manufacture plant disposal of refuse incineration flue gas, not only reduced the treatment facility input, also significantly reduced purification operating cost and Cement Production cost, and burning heat energy utilization rate significantly improves.Adopt the inventive method to handle house refuse, its gas index that gives off is better than China's " consumer waste incineration pollution control criterion " (GB18485-2001); And the quality of the prepared cement products that goes out is unaffected.
The specific embodiment
The specific embodiment one: the method for present embodiment purifying flue gas of refuse burning is implemented according to the following steps: one, house refuse is dropped in the incinerator and burn; Two, incineration flue gas feeds the cement slurry grinding machine, and the cement raw meal mill built-in temperature is not less than 65 ℃; Three, the flue gas ash removal that raw mill is discharged; Four, the flue gas after the dedusting is sent into the burning of cement roasting shaft kiln secondary: secondary burns the air that is fed in the shaft kiln must be through The pre-heat treatment, and the air excess amount is 140%～200%; Five, secondary incineration flue gas dedusting can enter atmosphere; Wherein the temperature in the shaft kiln is 1100～1700 ℃ in the step 4, and the air themperature after The pre-heat treatment is not less than 150 ℃, and the time of staying of the flue gas after the dedusting in shaft kiln is at least 2s.
The gas index that present embodiment enters atmosphere is better than China's " consumer waste incineration pollution control criterion " (GB18485-2001) after testing.
The specific embodiment two: the difference of the present embodiment and the specific embodiment one is: the cement raw meal mill built-in temperature is 70～120 ℃ in the step 2.Other step and parameter are identical with embodiment one.
The specific embodiment three: the difference of the present embodiment and the specific embodiment one is: the cement raw meal mill built-in temperature is 80～100 ℃ in the step 2.Other step and parameter are identical with embodiment one.
The specific embodiment four: the difference of the present embodiment and the specific embodiment one is: adopt electrostatic precipitation or bag-type dust in the step 3.Other step and parameter are identical with embodiment one.
The specific embodiment five: the difference of the present embodiment and the specific embodiment one is: adopt electrostatic precipitation or bag-type dust in the step 5.Other step and parameter are identical with embodiment one.
The specific embodiment six: the difference of the present embodiment and the specific embodiment one is: institute's bubbling air excess quantity is 160%～180% in the step 4 shaft kiln.Other step and parameter are identical with embodiment one.
The specific embodiment seven: the difference of the present embodiment and the specific embodiment one is: the temperature in the step 4 in the shaft kiln is 1100～1200 ℃.Other step and parameter are identical with embodiment one.
The specific embodiment eight: the difference of the present embodiment and the specific embodiment one is: the temperature in the step 4 in the shaft kiln is 1120～1180 ℃.Other step and parameter are identical with embodiment one.
The specific embodiment nine: present embodiment with the difference of the specific embodiment one is: the temperature in the step 4 in the shaft kiln is that 1150 ℃ of other steps and parameter are identical with embodiment one.
The specific embodiment ten: the difference of the present embodiment and the specific embodiment one is: the air themperature in the step 4 after The pre-heat treatment is 160～200 ℃.Other step and parameter are identical with embodiment one.
The specific embodiment 11: the difference of the present embodiment and the specific embodiment one is: the air themperature in the step 4 after The pre-heat treatment is 180 ℃.Other step and parameter are identical with embodiment one.
The specific embodiment 12: the difference of the present embodiment and the specific embodiment one is: the time of staying of the flue gas in the step 4 after the dedusting in shaft kiln is 2.5～5s.Other step and parameter are identical with embodiment one.
The specific embodiment 13: the difference of the present embodiment and the specific embodiment one is: the time of staying of the flue gas in the step 4 after the dedusting in shaft kiln is 3s.Other step and parameter are identical with embodiment one.
The specific embodiment 14: the difference of the present embodiment and the specific embodiment one is: the temperature in the step 4 in the shaft kiln is 1300～1600 ℃.Other step and parameter are identical with embodiment one.
The specific embodiment 15: the difference of the present embodiment and the specific embodiment one is: the temperature in the step 4 in the shaft kiln is 1400～1500 ℃.Other step and parameter are identical with embodiment one.
Claims (6)
1, a kind of method of purifying flue gas of refuse burning is characterized in that the method for purifying flue gas of refuse burning is implemented according to the following steps: one, house refuse is dropped in the incinerator and burn; Two, incineration flue gas feeds the cement slurry grinding machine, and the cement raw meal mill built-in temperature is not less than 65 ℃; Three, the flue gas ash removal that raw mill is discharged; Four, the flue gas after the dedusting is sent into the burning of cement roasting shaft kiln secondary: secondary burns the air that is fed in the shaft kiln must be through The pre-heat treatment, and the air excess amount is 140%～200%; Five, secondary incineration flue gas dedusting can enter atmosphere; Wherein the temperature in the shaft kiln is 1100～1700 ℃ in the step 4, and the air themperature after The pre-heat treatment is not less than 150 ℃, and the time of staying of the flue gas after the dedusting in shaft kiln is at least 2s.
2, the method for a kind of purifying flue gas of refuse burning according to claim 1 is characterized in that adopting in the step 3 electrostatic precipitation or bag-type dust.
3, the method for a kind of purifying flue gas of refuse burning according to claim 1 is characterized in that institute's bubbling air excess quantity is 160%～180% in the step 4 shaft kiln.
4, the method for a kind of purifying flue gas of refuse burning according to claim 1 is characterized in that the temperature in the shaft kiln is 1100～1200 ℃ in the step 4.
5, the method for a kind of purifying flue gas of refuse burning according to claim 1 is characterized in that the air themperature after The pre-heat treatment is 160～200 ℃ in the step 4.
6, the method for a kind of purifying flue gas of refuse burning according to claim 1 is characterized in that the time of staying of the flue gas after the dedusting in shaft kiln is 2.5～5s in the step 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100645754A CN101279191A (en) | 2008-05-23 | 2008-05-23 | Method for purifying flue gas of refuse burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100645754A CN101279191A (en) | 2008-05-23 | 2008-05-23 | Method for purifying flue gas of refuse burning |
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| Publication Number | Publication Date |
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| CN101279191A true CN101279191A (en) | 2008-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100645754A Pending CN101279191A (en) | 2008-05-23 | 2008-05-23 | Method for purifying flue gas of refuse burning |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113030A (en) * | 2013-03-05 | 2013-05-22 | 郭文龙 | Method for treating household garbage by absorbing heat energy through raw meal nodules |
| CN103922624A (en) * | 2014-04-16 | 2014-07-16 | 南京凯盛国际工程有限公司 | Clinker sintering system taking carbide slag as calcareous raw material and being used for treating smoke generated in waste incineration |
| CN104764020A (en) * | 2015-04-04 | 2015-07-08 | 北京德美高科科技有限责任公司 | Petroleum drilling and production solid waste combustion processing system and method |
| CN104975179A (en) * | 2015-06-17 | 2015-10-14 | 山西八达镁业有限公司 | Method for jointly operating metal magnesium smelting dolomite roasting and waste incineration |
-
2008
- 2008-05-23 CN CNA2008100645754A patent/CN101279191A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113030A (en) * | 2013-03-05 | 2013-05-22 | 郭文龙 | Method for treating household garbage by absorbing heat energy through raw meal nodules |
| CN103922624A (en) * | 2014-04-16 | 2014-07-16 | 南京凯盛国际工程有限公司 | Clinker sintering system taking carbide slag as calcareous raw material and being used for treating smoke generated in waste incineration |
| CN104764020A (en) * | 2015-04-04 | 2015-07-08 | 北京德美高科科技有限责任公司 | Petroleum drilling and production solid waste combustion processing system and method |
| CN104975179A (en) * | 2015-06-17 | 2015-10-14 | 山西八达镁业有限公司 | Method for jointly operating metal magnesium smelting dolomite roasting and waste incineration |
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Open date: 20081008 |