CN116924703A - Energy-saving and emission-reducing calcium oxide production method - Google Patents
Energy-saving and emission-reducing calcium oxide production method Download PDFInfo
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- CN116924703A CN116924703A CN202311026517.3A CN202311026517A CN116924703A CN 116924703 A CN116924703 A CN 116924703A CN 202311026517 A CN202311026517 A CN 202311026517A CN 116924703 A CN116924703 A CN 116924703A
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- calcium oxide
- storage box
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- saving
- energy
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- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 59
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 84
- 238000001354 calcination Methods 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 51
- 235000019738 Limestone Nutrition 0.000 claims abstract description 36
- 239000006028 limestone Substances 0.000 claims abstract description 36
- 239000002912 waste gas Substances 0.000 claims abstract description 30
- 239000011575 calcium Substances 0.000 claims abstract description 28
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000000571 coke Substances 0.000 claims description 25
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 10
- 238000012824 chemical production Methods 0.000 abstract description 3
- 235000012255 calcium oxide Nutrition 0.000 description 43
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002894 chemical waste Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a production method of energy-saving and emission-reducing calcium oxide, and relates to the technical field of chemical production. The invention comprises the following steps: s1: calcining limestone; s2: the calcined product is received into a storage box according to a block shape; in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower; after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the calcium oxide contacts with the waste gas in the storage tank is more than 85% and less than 90%; on the premise of ensuring the quality of the calcium oxide, even if the yield is increased, the emission of waste gas can be reduced, and the purposes of increasing the yield and reducing the emission are realized.
Description
Technical Field
The invention relates to the technical field of chemical production, in particular to an energy-saving and emission-reducing calcium oxide production method.
Background
Chemical waste gas often contains a plurality of pollutant types, has complex physical and chemical properties and different toxicity, seriously pollutes the environment and affects the health of human bodies. The chemical waste gas components produced in different chemical production industries are quite different.
The calcium oxide material has excellent thermodynamic stability, desulfurization and dephosphorization performance, carbon adsorption performance and the like, and is an important alkaline material in industrial production and application.
In the process of preparing calcium oxide by calcining limestone, carbon dioxide waste gas and sulfur dioxide waste gas are generated. Along with the improvement of factory productivity, the investment for waste gas treatment is correspondingly increased so as to reach the standard of environmental protection emission.
And for the production enterprises, how to improve the utilization ratio of the waste gas, the emission of the waste gas can be reduced while the waste gas is utilized, the investment of waste gas treatment equipment is reduced, and the method has great help to the camping of the production enterprises.
Aiming at the calcium oxide which is an inorganic compound in the production enterprises of calcium oxide, the chemical formula is CaO and is commonly known as quicklime. The physical property is white powder on the surface, the impurity is off-white, and the powder is light yellow or gray when containing impurities, and has hygroscopicity. After moisture absorption and contact with water, the quicklime is converted into slaked lime, forming Ca (OH) 2, which conversion time is called the abatement time. The effective calcium content in the calcium oxide has a direct effect on the abatement time. Therefore, the control of effective calcium in the calcium oxide is a key control on the product performance.
Disclosure of Invention
The invention aims to provide an energy-saving and emission-reducing calcium oxide production method, which can reduce the emission of waste gas and realize the purposes of increasing yield and reducing emission even if increasing yield under the premise of ensuring the quality of calcium oxide.
In order to solve the problems, the invention adopts the following technical means:
the energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Preferably, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is 20% higher than the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is taken up 50% -70% of bin volume.
The invention has the following beneficial effects in the using process:
the method comprises the steps of preparing calcium oxide by using the calcination of limestone, mixing the limestone with coke, calcining at a high temperature, contacting the calcined calcium oxide with carbon dioxide and sulfur dioxide in a storage tank under a specific pressure condition, and reacting the calcium oxide with the carbon dioxide and the sulfur dioxide to generate calcium carbonate and calcium sulfate, so that the effective calcium of the calcium oxide is reduced, and the emission of the carbon dioxide and the sulfur dioxide is reduced. And by utilizing the blocky calcium oxide and the pressure maintaining setting, the effective calcium in the calcium oxide is prevented from being greatly reduced, and the effective calcium in the calcium oxide can be maintained in a range of more than 85% and less than 90%. Can be well applied to building materials, and can avoid excessively short reduction time.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without collision.
Example 1
The energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Further, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is 20% higher than the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 50% of bin volume.
Example 2
The energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Further, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is 20% higher than the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 60% of bin volume.
Example 3
The energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Further, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is 20% higher than the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 70% of bin volume.
Example 4
The energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Further, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is the same as the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 70% of bin volume.
Example 5
The energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Further, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is 10% higher than the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 70% of bin volume.
Example 6
The energy-saving and emission-reducing calcium oxide production method comprises the following steps:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
Further, in the step S1, in the calcination process, limestone and coke are mixed and calcined, and the addition amount of the coke is 7% -9% of the weight of the limestone.
Further, in step S1, the calcination temperature is 950-1150 ℃.
Further, the exhaust gas is carbon dioxide and sulfur dioxide.
Further, in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is less than 50mm.
Further, the step S1 is performed in a shaft kiln, and the exhaust gas generated in the step S1 is filtered in a settling chamber before entering a storage tank, so as to remove particulate impurities contained in the exhaust gas.
Further, the storage box is in a pressure maintaining state, and the pressure in the storage box is greater than 30% of the ambient pressure.
Still further, the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 70% of bin volume.
By comparing the foregoing embodiments, the conditions of the calcium oxide materials stored in the storage tank are integrated, after the production is completed in different environments, the content of the effective calcium in the materials produced in the pressure maintaining environment can be maintained in a relatively stable range, the content of the effective calcium is prevented from being less than 85%, meanwhile, as the materials in the storage tank are more and more, the reaction time is longer and longer, and after 70% of the materials in the storage tank are piled up, the reaction is completed, the unloading is started, and the next production is performed. After the material in the storage case is deposited more than 80%, on the one hand, the space that leaves for waste gas to pass through can become little, on the other hand, after the space of top is too little, can influence effective calcium's maintenance, and the space is too little, can cause waste gas in a large amount of gaps of carrying out the windrow, can't timely discharge from the storage case, causes the effective calcium content of calcium oxide to be less than 85%.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (8)
1. The energy-saving and emission-reducing calcium oxide production method is characterized by comprising the following steps of:
s1: calcining limestone;
s2: the calcined product is received into a storage box according to a block shape;
in the calcining process of the step S1, exhaust gas generated by calcining is conducted to be led into a storage box, and the exhaust gas generated by calcining enters from the top of the storage box and is discharged from the bottom side of the storage box to the atmosphere through an exhaust gas tower;
after the calcination in the step S1 is completed, the effective calcium content of the calcium oxide entering the storage tank is more than 90%, and the effective calcium content of the calcium oxide after the storage tank is contacted with the waste gas is more than 85% and less than 90%.
2. The method for producing the energy-saving and emission-reducing calcium oxide according to claim 1, which is characterized in that: in the step S1, in the calcination process, limestone and coke are mixed for calcination, and the addition amount of the coke is 7% -9% of the weight of the limestone.
3. The method for producing energy-saving and emission-reducing calcium oxide according to claim 1 or 2, characterized in that: in the step S1, the calcination temperature is 950-1150 ℃.
4. The method for producing the energy-saving and emission-reducing calcium oxide according to claim 1, which is characterized in that: the exhaust gas is carbon dioxide and sulfur dioxide.
5. The method for producing the energy-saving and emission-reducing calcium oxide according to claim 2, which is characterized in that: in the step S1, the particle size of the limestone is 50-150 mm, and the particle size of the coke is smaller than 50mm.
6. The method for producing the energy-saving and emission-reducing calcium oxide according to claim 1, which is characterized in that: the step S1 is carried out in a vertical kiln, and the waste gas generated in the step S1 is filtered by a settling chamber before entering a storage box, so that particulate impurities contained in the waste gas are removed.
7. The method for producing the energy-saving and emission-reducing calcium oxide according to claim 1, which is characterized in that: the storage box is in a pressure maintaining state, and the pressure in the storage box is 20% higher than the ambient pressure.
8. The method for producing the energy-saving and emission-reducing calcium oxide according to claim 1, which is characterized in that: the top surface intercommunication of bin has the intake pipe that is used for the gas-supply, the lateral wall intercommunication of bin is used for the exhaust blast pipe, and the pipe diameter of intake pipe is greater than the pipe diameter of blast pipe, and the top surface of bin is equipped with the pressurize valve, and the pressurize valve communicates the waste gas tower, and the bin material is deposited and is started unloading after accounting for 50% -70% of bin volume.
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