CN211913798U - Device for preparing adsorbent for waste incineration power plant - Google Patents
Device for preparing adsorbent for waste incineration power plant Download PDFInfo
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- CN211913798U CN211913798U CN201921276169.4U CN201921276169U CN211913798U CN 211913798 U CN211913798 U CN 211913798U CN 201921276169 U CN201921276169 U CN 201921276169U CN 211913798 U CN211913798 U CN 211913798U
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Abstract
The utility model provides a preparation is with device that is used for adsorbent of msw incineration power plant, it includes: the first mixing unit is used for mixing the fly ash of the biomass power plant and clay mineral substances according to a set proportion to form a mixture; the acidification unit is used for carrying out acidification treatment on the formed mixture; the stirring unit is used for stirring the mixture solution; the rinsing unit is used for enabling the pH value of the mixture solution to reach a set range; the calcining unit is used for drying and calcining the mixture solution; a grinding unit for grinding the calcined substance; the screening unit is used for screening the ground objects to obtain screened objects; the second mixing unit is used for uniformly mixing the sulfur powder and the screened substances; and the sulfurizing unit is used for heating the uniformly mixed sulfur powder and the screened substance to obtain the sulfurizing modified adsorbent. According to the utility model discloses a device of preparation adsorbent for msw incineration power plant can prepare the modified adsorbent of sulfurization, compares that activated carbon preparation process is simple, with low costs, pollutes fewly.
Description
Technical Field
The utility model relates to a waste incineration power plant resource cyclic utilization technique particularly relates to a device of adsorbent that preparation was used for waste incineration power plant.
Background
With the development of national economy and the improvement of the living standard of people in China, the generation amount of urban domestic garbage is increased day by day, and the phenomenon of enclosing the city with garbage becomes a troublesome problem influencing the development of various large and medium cities. Compared with other garbage disposal technologies, the garbage incineration power generation technology can better realize the aims of reduction, harmlessness and reclamation, and becomes an effective means for relieving and solving the disposal dilemma of the garbage at home and abroad at present.
Due to the diversity, complexity and nonuniformity of the components of the municipal solid waste, complex chemical reactions can occur in the waste incineration process, and a series of pollutants harmful to human bodies, such as mercury, cadmium, lead and other heavy metals and dioxin and other harmful substances, are further generated. Heavy metals such as mercury are difficult to eliminate once introduced into the environment due to long-term and close interactions between the atmosphere, soil, and water bodies. Heavy metals entering the water body can finally enter the digestive system of a human body through a food chain if being absorbed by organisms such as fish, and further cause diseases such as renal function attenuation, nervous system damage and the like. Dioxin has low volatility, high melting point and boiling point, is extremely insoluble in water, can be dissolved in an organic solvent and is white crystal at normal temperature. Dioxin has great toxicity which is 900 times that of arsenic and 1000 times that of potassium cyanide. The effects of dioxins on the human body include weight loss, skin canceration, liver lesions, and the like. Therefore, the problem of emission reduction of pollutants such as heavy metals and dioxin in incineration flue gas has attracted more and more extensive attention.
The activated carbon has an obvious effect on adsorbing pollutants in incineration flue gas, and the effect of cooperatively removing various pollutants such as heavy metal, dioxin, acid gas and the like in the flue gas can be achieved by spraying the activated carbon into the flue of the incinerator, so that the activated carbon is a cooperative removal adsorbent for various pollutants commonly adopted by the current garbage power plant. However, the use of activated carbon adsorbents in industrial fields is limited due to their high cost. There is therefore a need to find an inexpensive, highly effective pollutant removal adsorbent that can replace activated carbon.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
In order to solve the above problem at least in part, the utility model discloses a device of adsorbent for msw incineration power plant is prepared, it includes:
the first mixing unit is used for mixing the fly ash of the biomass power plant and clay mineral substances according to a set proportion to form a mixture;
an acidification unit for acidifying the mixture formed in the first mixing unit with an acidic solution and forming a mixture solution;
a stirring unit for stirring the mixture solution;
the rinsing unit is used for rinsing the stirred mixture solution by using deionized water so as to enable the pH value of the mixture solution to reach a set range;
the calcining unit is used for drying and calcining the rinsed mixture solution;
a grinding unit for grinding the calcined product after cooling to form a ground product;
the screening unit is used for screening the ground materials to obtain screened materials;
the second mixing unit is used for uniformly mixing the sulfur powder and the sieved substances;
and the sulfurizing unit is used for heating the uniformly mixed sulfur powder and the screened substance to obtain the sulfurizing modified adsorbent.
In an embodiment of the present invention, the mass ratio of clay mineral in the mixture of fly ash and clay mineral in biomass power plant is 20% -30%.
In an embodiment of the present invention, the acidic solution is concentrated sulfuric acid, the mass concentration of the concentrated sulfuric acid pus is 20% -50%, and the mass ratio of the concentrated sulfuric acid solution to the mixture is 3-5.
In one embodiment of the present invention, the stirring unit comprises a constant temperature water bath, wherein the stirring temperature is 60 ℃ to 90 ℃, and the stirring speed is 150 to 250 r/min.
In one embodiment of the present invention, the calcination unit comprises a tube furnace, and the rinsed mixture solution is dried and placed in a stainless steel reaction boat and calcined in the tube furnace.
In one embodiment of the utility model, the calcination is carried out in the air atmosphere, the calcination time is 2-3h, and the calcination temperature is 850-1000 ℃.
In one embodiment of the present invention, the sieving unit comprises a 200 mesh sieve.
In one embodiment of the present invention, the mass ratio of the sulfur powder to the sieved material is 2:1 to 3: 1.
In an embodiment of the present invention, the sulfurizing unit comprises a muffle furnace, the heating temperature is 300-500 ℃, and the heating time is 2-4 h.
According to the utility model discloses a preparation is used for device of adsorbent of msw incineration power plant through mixing biomass power plant flying dust and mineral substance class adsorbent according to a certain proportion and carry out a series of processing such as sulfurization modification, not only can compensate the shortcoming that the active carbon is expensive, has solved fly ash, tradition mineral substance etc. and has got rid of when as the adsorbent and burn heavy metal performance such as flue gas mercury relatively poor not enough, has advantages such as preparation process is simple, the pollution is few moreover, the industry of being convenient for promotes.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.
In the drawings:
fig. 1 shows a schematic structural view of an apparatus for preparing an adsorbent for a waste incineration power plant according to an embodiment of the present invention;
fig. 2 shows a schematic flow diagram of a method of preparing a sorbent for a waste-incineration power plant, according to an embodiment of the invention.
Description of reference numerals:
100 device for preparing adsorbent for waste incineration power plant
101 first mixing unit
102 acidification unit
103 stirring unit
104 rinsing unit
105 calcination Unit
106 grinding unit
107 screening unit
108 second mixing unit
109 sulfurization unit
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring embodiments of the present invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the invention are possible in addition to these detailed descriptions.
Before the introduction, the meaning of the terms in this text is explained.
Fly ash of biomass power plant: the fly ash of the biomass power plant is alumino-silicate glassy ash formed by biomass under the condition of high-temperature combustion, contains a large amount of active silicon, aluminum oxide and a certain amount of residual black carbon in the fly ash, has a porous structure and a large specific surface area, and has strong adsorption performance on heavy metals;
a garbage incinerator: the equipment for harmless incineration treatment of domestic garbage is characterized in that the domestic garbage is mixed with air in a hearth for combustion, and finally is changed into high-temperature flue gas and slag to enter subsequent treatment equipment;
a muffle furnace: a universal heating device can be divided into a box furnace, a tube furnace and a crucible furnace according to the appearance shape, and is generally used for hot working, industrial workpiece treatment, cement and building material industries.
As mentioned above, activated carbon has a significant effect on the adsorption of pollutants in incineration flue gas, but the application of activated carbon adsorbents in the industrial field is restricted due to the high cost of the activated carbon adsorbents.
Other common types of adsorbents mainly include fly ash adsorbents, mineral adsorbents, precious metal adsorbents and the like, wherein the mineral adsorbents such as bentonite, vermiculite, zeolite and the like are very potential adsorbents due to low price and abundant reserves. The fly ash of the biomass power plant in the fly ash adsorbent has strong adsorption performance on pollutants such as heavy metals due to the fact that the fly ash contains a large amount of active silicon, aluminum oxide and the like. However, the pure mineral adsorbents and fly ash adsorbents have poor removal effects on pollutants such as heavy metals in flue gas, but the novel adsorbents obtained by modifying the adsorbents by various methods such as halogen salt impregnation, sulfurization and the like have greatly improved adsorption performance on pollutants such as heavy metals in flue gas. For example, after the sulfurization operation is performed on mineral adsorbents and fly ash adsorbents at different temperatures, the adsorption of mercury vapor in flue gas not only includes physical adsorption, but also chemical adsorption (as shown in formula 1).
S + Hg → HgS formula 1
In addition, introduction of sulfur and its compounds into the waste incineration furnace can suppress generation of dioxin, whose main route to suppress generation of dioxin is to reduce chlorine gas (Cl)2+) The formation of copper (Cu) and the poisoning of copper (Cu) catalysts.
The utility model discloses a mix biomass power plant flying dust and mineral substance class adsorbent according to a certain proportion and carry out a series of processing such as sulfurization modification, not only can compensate the shortcoming that the active carbon is expensive, solved fly ash, traditional mineral substance etc. and when the adsorbent the desorption burn heavy metal performance such as flue gas mercury relatively poor not enough, have the preparation process moreover simple, pollute advantage such as few, the industry of being convenient for promotes.
An apparatus for preparing an adsorbent for a waste incineration power plant according to an embodiment of the present invention will be described in detail with reference to fig. 1.
As shown in fig. 1, the apparatus 100 for preparing a sorbent for a waste incineration power plant according to the present embodiment includes a first mixing unit 101, an acidification unit 102, a stirring unit 103, a rinsing unit 104, a calcination unit 105, a grinding unit 106, a sieving unit 107, a second mixing unit 108, and a sulfurization unit 109.
The first mixing unit 101 is used for mixing the fly ash of the biomass power plant and clay minerals according to a set proportion to form a mixture. The first mixing unit 101 may be of various trough and pan type configurations. In the embodiment, the fly ash refers to the fly ash of a biomass power plant, the fly ash contains a large amount of active silicon, aluminum oxide and a certain amount of residual black carbon, and the fly ash has a porous structure, a large specific surface area and a strong adsorption property on heavy metals. Examples of the clay minerals include vermiculite and bentonite. Illustratively, the mass ratio of the clay minerals in the mixture of the fly ash of the biomass power plant and the clay minerals is 20-30%.
The acidification unit 102 is configured to perform acidification treatment on the mixture formed in the first mixing unit 101 by using an acidic solution, and form a mixture solution. The acidification unit 102 is, for example, various acid tanks. In this embodiment, the acidic solution is concentrated sulfuric acid, the mass concentration of the concentrated sulfuric acid pus is 20% to 50%, and the liquid-solid ratio (mass ratio) of the concentrated sulfuric acid solution to the mixture is 3 to 5.
The stirring unit 103 is used for stirring the mixture solution. In this embodiment, the stirring unit 103 includes a constant temperature water bath, wherein the stirring temperature (i.e., the temperature of the constant temperature water bath) is 60 ℃ to 90 ℃, and the stirring speed is 150 r/min to 250 r/min.
The rinsing unit 104 is configured to rinse the stirred mixture solution with deionized water to reach a set pH range. The set range is, for example, 4.5 to 5.5.
The calcining unit 105 is used for drying and calcining the rinsed mixture solution. The calcination unit 105 comprises a tube furnace, and the rinsed mixture solution is dried and placed in a stainless steel reaction boat and placed in the tube furnace for calcination. In the embodiment, the calcination is carried out in an air atmosphere, the calcination time is 2-3h, and the calcination temperature is 850-1000 ℃.
The grinding unit 106 is used to grind the calcined product after it is cooled to form a ground product. The calcined material may be made into fine particles by grinding in the grinding unit 106.
The screening unit 107 screens the ground material to obtain a screened material. Illustratively, the sieving unit comprises a 200 mesh sieve.
The second mixing unit 108 is used for uniformly mixing the sulfur powder and the sieved substances. The second mixing unit 108 may be of various trough and pan type configurations. In the embodiment, the mass ratio of the sulfur powder to the sieved substances is 2: 1-3: 1.
The sulfurizing unit 109 is used for heating the sulfur powder and the sieved matter which are uniformly mixed, so as to obtain the sulfurizing modified adsorbent. In this embodiment, the sulfurizing unit 109 comprises a muffle furnace, the heating temperature is 300-500 ℃, and the heating time is 2-4 h. And after heating the sulfur powder and the screened substances in a muffle furnace for 2-4 hours, cooling the product to obtain the sulfurization modified adsorbent.
Fig. 2 shows a schematic flow diagram of a method of preparing a sorbent for a waste-incineration power plant, according to an embodiment of the invention.
As shown in fig. 2, the method 200 disclosed in this embodiment includes:
The mixture is acidified with an acidic solution and a mixture solution is formed, step 202. In the embodiment, the acid solution is concentrated sulfuric acid, the mass concentration of the concentrated sulfuric acid pus is 20% -50%, and the liquid-solid ratio of the concentrated sulfuric acid solution to the mixture is 3-5. Illustratively, the mixture is acidified, for example in an acid tank.
In step 203, the mixture solution is stirred for a set time at a set temperature. Illustratively, the mixture solution is stirred in a constant temperature water bath, wherein the stirring temperature (i.e. the temperature of the constant temperature water bath) is 60-90 ℃, and the stirring speed is 150-250 r/min.
Step 205, drying the rinsed mixture solution, and calcining at a set temperature for a set time to obtain a calcined product. Illustratively, the calcination is carried out in an air atmosphere, the calcination time is 2-3h, and the calcination temperature is 850-1000 ℃. Illustratively, in the present embodiment, a stainless steel reaction boat and a tube furnace are used for calcination, and specifically, after the mixture solution is dried, the mixture solution is placed into the stainless steel reaction boat and placed into the tube furnace, and calcination is performed for 2-3 hours under the conditions of an air atmosphere and 850-1000 ℃.
The calcine is cooled and after cooling the calcine is ground and sieved, step 206, to obtain a sieved material. Illustratively, the calcined material is ground by, for example, various grinding devices to be converted into fine particles, and is screened by a screening device such as a 200-mesh screen to remove impurities, resulting in a screened material.
And step 207, after the sulfur powder and the screening are uniformly mixed, heating the mixture of the sulfur powder and the screening for a set time at a set temperature, and then cooling a product to obtain the sulfurization modified adsorbent. Illustratively, in the embodiment, the mixture of the sulfur powder and the sieved material is heated in a muffle furnace at a constant temperature, for example, 300 to 500 ℃ for 2 to 4 hours.
According to the utility model discloses a device and method of preparation adsorbent for waste incineration power plant are through mixing biomass power plant flying dust and mineral substance class adsorbent according to a certain proportion and carry out a series of processing such as sulfurization modification, have not only solved fly ash, traditional mineral substance etc. and burn heavy metal performance such as flue gas mercury poor not enough as burning flue gas adsorbent desorption, have low price, preparation process advantage such as simple, pollution are few moreover, the industry of being convenient for promotes.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An apparatus for preparing a sorbent for a waste incineration power plant, comprising:
the first mixing unit is used for mixing the fly ash of the biomass power plant and clay mineral substances according to a set proportion to form a mixture;
an acidification unit for acidifying the mixture formed in the first mixing unit with an acidic solution and forming a mixture solution;
a stirring unit for stirring the mixture solution;
the rinsing unit is used for rinsing the stirred mixture solution by using deionized water so as to enable the pH value of the mixture solution to reach a set range;
the calcining unit is used for drying and calcining the rinsed mixture solution;
a grinding unit for grinding the calcined product after cooling to form a ground product;
the screening unit is used for screening the ground materials to obtain screened materials;
the second mixing unit is used for uniformly mixing the sulfur powder and the sieved substances;
and the sulfurizing unit is used for heating the uniformly mixed sulfur powder and the screened substance to obtain the sulfurizing modified adsorbent.
2. The apparatus of claim 1, wherein the stirring unit comprises a thermostatted water bath.
3. The apparatus of claim 1, wherein the calcination unit comprises a tube furnace.
4. The apparatus of claim 1, wherein the screening unit comprises a 200 mesh screen.
5. The apparatus of claim 1, wherein the sulfurizing unit comprises a muffle furnace.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110449119A (en) * | 2019-08-07 | 2019-11-15 | 光大生态环境设计研究院有限公司 | Method and device of the preparation for the adsorbent of garbage incinerating power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110449119A (en) * | 2019-08-07 | 2019-11-15 | 光大生态环境设计研究院有限公司 | Method and device of the preparation for the adsorbent of garbage incinerating power plant |
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