CN115025751B - System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash - Google Patents

System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash Download PDF

Info

Publication number
CN115025751B
CN115025751B CN202210725739.3A CN202210725739A CN115025751B CN 115025751 B CN115025751 B CN 115025751B CN 202210725739 A CN202210725739 A CN 202210725739A CN 115025751 B CN115025751 B CN 115025751B
Authority
CN
China
Prior art keywords
fluidized bed
fly ash
raw material
bed
waste liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210725739.3A
Other languages
Chinese (zh)
Other versions
CN115025751A (en
Inventor
徐冬
张帅
高腾飞
余学海
韩涛
王天堃
顾永正
赵瑞
杨阳
黄艳
常林
刘毅
张金升
冯蕾
王志勇
杨晋宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guoneng Jinjie Energy Co ltd
Guoneng Guohua Beijing Electric Power Research Institute Co ltd
GD Power Development Co Ltd
National Energy Group New Energy Technology Research Institute Co Ltd
Original Assignee
Guoneng Jinjie Energy Co ltd
Guoneng Guohua Beijing Electric Power Research Institute Co ltd
GD Power Development Co Ltd
National Energy Group New Energy Technology Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guoneng Jinjie Energy Co ltd, Guoneng Guohua Beijing Electric Power Research Institute Co ltd, GD Power Development Co Ltd, National Energy Group New Energy Technology Research Institute Co Ltd filed Critical Guoneng Jinjie Energy Co ltd
Priority to CN202210725739.3A priority Critical patent/CN115025751B/en
Publication of CN115025751A publication Critical patent/CN115025751A/en
Application granted granted Critical
Publication of CN115025751B publication Critical patent/CN115025751B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/22—Chromium or chromium compounds, e.g. chromates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

The invention relates to the technical field of recycling of absorbent waste liquid and preparation of adsorption materials, and discloses a system and a method for preparing the adsorption materials from carbon dioxide absorbent waste liquid and fly ash. The system comprises a raw material screening bed, an adsorption material preparation device and a conveying device, wherein a primary screen and a secondary screen are sequentially arranged in the raw material screening bed from top to bottom; the adsorbent material preparation device comprises a fluidized bed, a metering device, a blowing device and a heating device, wherein a plurality of nozzles are arranged in the fluidized bed, absorbent waste liquid of the metering device is sprayed into the fluidized bed through the nozzles, an air inlet is formed in the bottom of the fluidized bed, and the blowing device is used for blowing hot air heated by the heating device into the fluidized bed through the air inlet; the conveying device is positioned between the raw material screening bed and the fluidized bed and is used for conveying the raw materials on the secondary screen into the fluidized bed. The system and the method realize the resource utilization of the carbon dioxide absorbent waste liquid and the fly ash.

Description

System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash
Technical Field
The invention relates to the technical field of recycling of absorbent waste liquid and preparation of adsorption materials, in particular to a system and a method for preparing adsorption materials from carbon dioxide absorbent waste liquid and fly ash.
Background
The invention provides an integrated device and a method for preparing an adsorption material from fly ash and carbon dioxide absorbent waste liquid, wherein the carbon dioxide capture system after combustion of a coal-fired power plant mainly adopts chemical absorbents such as alcohol amine, phase change, ionic liquid and the like, part of absorbent waste liquid can be generated in the operation process, the traditional mode mainly comprises the steps of conveying the absorbent waste liquid to a boiler hearth for incineration, and the preparation of a porous adsorption material by mixing the absorbent waste liquid with a large amount of fly ash generated by a power plant dust remover is a good mode of recycling the absorbent waste liquid and the fly ash.
Disclosure of Invention
The invention aims to solve the problem that the carbon dioxide absorbent waste liquid is not effectively utilized in the prior art, and provides a system and a method for preparing an adsorption material from the carbon dioxide absorbent waste liquid and fly ash.
In order to achieve the above object, the invention provides a system for preparing an adsorption material by carbon dioxide absorbent waste liquid and fly ash, which comprises a raw material screening bed, an adsorption material preparation device and a conveying device,
the top of the raw material screening bed is provided with a raw material inlet, and a primary screen and a secondary screen are sequentially arranged in the raw material screening bed from top to bottom and are used for screening raw materials input through the raw material inlet;
the adsorbent material preparation device comprises a fluidized bed, a metering device, a blowing device and a heating device, wherein a plurality of nozzles are arranged in the fluidized bed, the heights of the nozzles are lower than the height of the conveying device, absorbent waste liquid of the metering device is sprayed into the fluidized bed through the nozzles, an air inlet is formed in the bottom of the fluidized bed, and the blowing device is used for blowing hot air heated by the heating device into the fluidized bed through the air inlet;
the conveying device is positioned between the raw material screening bed and the fluidized bed and is used for conveying the fly ash raw materials on the secondary screen into the fluidized bed.
Preferably, a collecting device is arranged below the secondary screen, and the bottom of the collecting device is of a non-porous structure and is used for collecting the fly ash raw material below the secondary screen.
Preferably, the system further comprises a storage tank and a downcomer connected to each other, the downcomer and the raw material screening bed being connected by a conduit for introducing raw material on the primary screen and/or fly ash raw material below the secondary screen into the downcomer.
Preferably, the primary screen, the secondary screen and the collecting device are arranged obliquely.
Preferably, the inclination angle a of the primary screen, the inclination angle b of the secondary screen, and the inclination angle c of the collecting device are 15 to 75 °.
Further preferably, the inclination angle a of the primary screen, the inclination angle b of the secondary screen, and the inclination angle c of the collecting device are 30 to 60 °.
Preferably, the conveying device is a belt-shaped, plate-shaped or tubular structure device, and baffle structures are arranged on two sides of the belt-shaped, plate-shaped structure device.
Preferably, openings are formed in two ends of the conveying device, one end of the opening is communicated with the raw material screening bed, the other end of the opening is communicated with the fluidized bed, and the height of one end of the conveying device, which is communicated with the raw material screening bed, is higher than that of one end of the conveying device, which is communicated with the fluidized bed.
Preferably, the metering device comprises an absorbent waste liquid supply device, a metering pump and an even distributor which are connected in sequence through pipelines, wherein the even distributor is used for equally distributing the absorbent waste liquid from the metering pump into a plurality of nozzles.
Preferably, the system further comprises an adsorption material storage device, wherein an adsorption material outlet is arranged at the top of the fluidized bed, and the adsorption material outlet is connected with the adsorption material storage device through a pipeline.
Preferably, the heat source of the heating device is from condensed water of a reboiler of a regeneration tower of a carbon dioxide capture system after combustion by a chemical absorption method, and the temperature of the condensed water is 110-120 ℃.
In a second aspect, the invention provides a method for preparing an adsorbent material from carbon dioxide absorbent waste liquor and fly ash, the method being carried out by a system as hereinbefore described,
the method comprises the following steps:
1) Sieving the fly ash put into the raw material sieving bed through the primary sieve and the secondary sieve in sequence, and then conveying the fly ash remained on the secondary sieve into the fluidized bed through the conveying device;
2) Spraying the carbon dioxide absorbent waste liquid into the fluidized bed through a plurality of nozzles, blowing hot air into the fluidized bed, controlling the inflow amount of the hot air to enable the fluidized bed to be in a bubbling fluidized bed state, and enabling the fly ash in the fluidized bed to be in contact with the carbon dioxide absorbent waste liquid to obtain the adsorption material.
Preferably, the carbon dioxide absorbent waste liquid contains ammonia, amide, imidazole and piperazine.
Preferably, the mesh numbers of the primary screen and the secondary screen are 20-30 mesh and 80-100 mesh respectively.
Preferably, in the step 2), when the fluidized bed is in a bubbling fluidized bed state, the inflow amount of hot air is controlled so that the fluidization velocity of the fly ash is 2-3 times of the critical fluidization velocity thereof.
Preferably, the method further comprises: after the preparation of the adsorption material is finished, the ventilation quantity of hot air is increased to enable the fluidized bed to be switched into a pneumatic conveying bed state, and the adsorption material is conveyed to a storage chamber through an adsorption material outlet.
Preferably, when the fluidized bed is in a pneumatic conveying bed state, the inflow amount of hot air is controlled to ensure that the fluidization speed of the fly ash is 6-10 times of the critical fluidization wind speed.
In a third aspect the present invention provides an adsorbent material prepared by the method described hereinbefore, said adsorbent material being a porous adsorbent material.
The beneficial effects of the invention are mainly represented in the following aspects:
(1) Provides a method for recycling carbon dioxide absorbent waste liquid and fly ash;
(2) An integrated process for preparing the adsorption material from the waste liquid of carbon dioxide absorbent and powdered coal ash is provided;
(3) The coupling integration of the adsorption material preparation process and the carbon dioxide trapping system after combustion by a chemical absorption method is realized, and the energy consumption and the cost of the preparation system are reduced;
(4) The prepared adsorption material is used for preparing heavy metal ions Cr 6+ Has excellent adsorption performance.
Drawings
FIG. 1 is a schematic diagram of a system for preparing an adsorbent material from carbon dioxide absorbent waste liquid and fly ash according to the present invention.
Description of the reference numerals
1 a raw material screening bed; 2 an adsorption material preparation device; 3 a conveying device; 4, a storage tank; 5 a down pipe; 6 an adsorption material storage device; 11 raw material inlets; 12 first-stage sieves; 13, a secondary screen; 14 a collection device; 21 fluidized bed; 22 metering devices; 23 blower means; 24 heating means; 211 nozzles; 212 an air inlet; 213 adsorbent material outlet; 221 an absorbent waste liquid supply device; 222 metering pump; 223 uniform distributor.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The invention provides a system for preparing an adsorption material by carbon dioxide absorbent waste liquid and fly ash, which is shown in figure 1, and comprises a raw material screening bed 1, an adsorption material preparation device 2 and a conveying device 3,
the top of the raw material screening bed 1 is provided with a raw material inlet 11, and a primary screen 12 and a secondary screen 13 are sequentially arranged in the raw material screening bed 1 from top to bottom and are used for screening the fly ash raw materials input through the raw material inlet 11;
the adsorption material preparation device 2 comprises a fluidized bed 21, a metering device 22, a blowing device 23 and a heating device 24, wherein a plurality of nozzles 211 are arranged in the fluidized bed 21, the height of the nozzles 211 is lower than that of the conveying device 3, absorbent waste liquid of the metering device 22 is sprayed into the fluidized bed 21 through the nozzles 211, an air inlet 212 is formed in the bottom of the fluidized bed 21, and the blowing device 23 is used for blowing hot air heated by the heating device 24 into the fluidized bed 21 through the air inlet 212;
the conveying device 3 is positioned between the raw material screening bed 1 and the fluidized bed 21 and is used for conveying the fly ash raw material on the secondary screen 13 into the fluidized bed 21.
In the system of the invention, after the fly ash raw materials are put into a raw material screening bed 1 through a raw material inlet 11, the raw materials are screened sequentially through a first-stage screen 12 and a second-stage screen 13, the raw materials with large particle sizes are screened by the first-stage screen 12, the raw materials with small particle sizes are screened by the second-stage screen 13, the raw materials remained on the second-stage screen 13 after being screened by the second-stage screen 13 are the fly ash with the qualified particle size range, namely, the screened raw materials with middle particle sizes are obtained, and then the qualified raw materials are conveyed into a fluidized bed 21 through a conveying device 3; the absorbent waste liquid is sprayed upwards into the fluidized bed 21 in an atomization state through the nozzle 211, the atomized dropping liquid of the absorbent waste liquid is uniformly and firmly attached to the surface or the inside of the fly ash particles, the fly ash particles are contacted with the absorbent waste liquid to be efficiently mixed to prepare the adsorption material, hot air is blown in from the bottom of the fluidized bed 21, the fluidized bed 21 is in a bubbling fluidized bed state by controlling the blowing speed through the blowing device 23, the nozzle is arranged in a dense phase region of the bubbling bed, the close contact of the atomized dropping liquid of the waste liquid and the fly ash particles is ensured, meanwhile, the viscosity of the waste liquid is improved compared with the hot air at normal temperature, so that the atomized dropping liquid of the waste liquid is more easily attached to the surface and the inside of a pore canal of the fly ash particles, and meanwhile, the hot air plays a drying role on the prepared adsorption material.
In the embodiment, 4 to 12 nozzles 211, preferably 6 to 8 nozzles, may be provided in the fluidized bed 21 in order to uniformly atomize the waste absorbent liquid according to practical situations.
In the invention, the raw material screening bed 1 can be in a vibrating screen type, the primary screen 12 and the secondary screen 13 are in a screen structure, and the screens can be replaced according to the required particle size range.
In a specific embodiment, a collecting device 14 is arranged below the secondary screen 13, and the bottom of the collecting device 14 is of a non-porous structure and is used for collecting the fly ash raw material below the secondary screen 13. In the invention, according to actual needs, the small-particle-size raw materials collected by the collecting device 14 can be mixed with the large-particle-size raw materials screened by the primary screen 12 for collection and storage, and can also be singly collected and stored, so that the subsequent application is facilitated.
Further, the system comprises a storage tank 4 and a downcomer 5 which are connected with each other, wherein the downcomer 5 and the raw material screening bed 1 are connected by a conduit for guiding raw material on the primary screen 12 and/or fly ash raw material below the secondary screen 13 into the downcomer 5. In this way, the raw materials which are sieved and remained on the primary screen 12 and the fly ash raw materials which are positioned below the secondary screen 13 through the secondary screen 13 flow through the downcomer to enter the storage tank for mixed storage under the action of vibration or gravity through the conduit, and then are used.
In particular embodiments, the primary screen 12, the secondary screen 13 and the collection device 14 are arranged obliquely in order to enable the feedstock to be transported by vibration or gravity to the conveyor 3 or conduit, saving energy. The inclination angles of the primary screen 12, the secondary screen 13 and the collecting device 14 can be adjusted according to actual conditions, and the inclination angles of the primary screen 12, the secondary screen 13 and the collecting device 14 can be the same or different. In a preferred embodiment, the inclination angle a of the primary screen 12, the inclination angle b of the secondary screen 13 and the inclination angle c of the collecting device 14 are 15 to 75 °. In a more preferred embodiment, the inclination angle a of the primary screen 12, the inclination angle b of the secondary screen 13 and the inclination angle c of the collecting device 14 are 30 to 60 °. In the present invention, as shown in fig. 1, the inclination angle is an angle formed by the primary screen 12, the secondary screen 13, or the collecting device 14 and the horizontal direction, unless otherwise specified.
In the present invention, the conveying means 3 may be a conventional choice in the art. In a specific embodiment, the conveying device 3 is a belt-shaped, plate-shaped or tubular structure device, and baffle structures are arranged on two sides of the belt-shaped, plate-shaped structure device to prevent raw materials from being lost on the conveying device 3.
In the present invention, the conveying device 3 may be disposed horizontally or may be disposed obliquely. In a specific embodiment, the two ends of the conveying device 3 are provided with openings, one end of the openings is communicated with the raw material screening bed 1, the other end of the openings is communicated with the fluidized bed 21, and the height of one end of the conveying device 3, which is communicated with the raw material screening bed 1, is higher than that of one end, which is communicated with the fluidized bed 21, and the raw material can slide into the fluidized bed 21 by utilizing gravity in an inclined arrangement mode, so that energy consumption is saved.
In a preferred embodiment, the metering device 22 comprises an absorbent waste liquid supply device 221, a metering pump 222 and an even distributor 223 connected in sequence by a pipe, the even distributor 223 being used for equally distributing the absorbent waste liquid from the metering pump 222 into a plurality of the nozzles 211. The absorbent waste liquid sequentially enters the metering pump 222 and the uniform distributor 223 from the absorbent waste liquid supply device 221 through pipelines, and the uniform distributor 223 is used for uniformly distributing the absorbent waste liquid into the plurality of nozzles 211, so that the waste liquid amount entering each nozzle is kept consistent, the absorbent waste liquid entering the fluidized bed 21 is ensured to be in a uniform atomization state, and the mixing efficiency of raw materials and the absorbent waste liquid is improved.
In the present invention, the heating device 24 is used for heating the air entering the bottom of the fluidized bed 21 to enhance the adhesion of the carbon dioxide absorbent waste liquid on the fly ash particles, and the heating device 24 is not limited as long as it can heat the air. In a preferred embodiment, the heating device 24 is a heat exchanger, and the heat source of the heating device 24 is condensed water from a reboiler of a regeneration tower of a carbon dioxide capturing system after combustion by a chemical absorption method, so as to reduce the preparation cost of the adsorption material, and further preferably, the temperature of the condensed water is 110-120 ℃. The heat exchanger is adopted as the heating device, condensed water is arranged in the middle of the heat exchanger, air is introduced into the cavity formed between the shell and the condensed water, and heat exchange can be carried out on the air through the condensed water.
In the present invention, the blowing rate can be adjusted by the blowing device 23. In a preferred embodiment, the system further comprises an adsorbent material storage means 6, the top of the fluidized bed 21 being provided with an adsorbent material outlet 213, said adsorbent material outlet 213 being connected to said adsorbent material storage means 6 by a pipe. After the preparation of the adsorption material in the bubbling fluidized bed state is completed, the blowing rate is increased by the blowing device 23, so that the operation state of the fluidized bed 21 is switched from the bubbling fluidized bed to the pneumatic conveying bed, and the adsorption material particles are conveyed to the adsorption material storage device 6 through the adsorption material outlet 213 under high-speed airflow, so as to obtain the adsorption material.
In a second aspect, the invention provides a method for preparing an adsorbent material from carbon dioxide absorbent waste liquor and fly ash, the method being carried out by a system as hereinbefore described,
the method comprises the following steps:
1) The fly ash put into the raw material screening bed 1 is screened by the primary screen 12 and the secondary screen 13 in sequence, and then the fly ash remained on the secondary screen 13 is conveyed into the fluidized bed 21 by the conveying device 3;
2) Spraying the carbon dioxide absorbent waste liquid into the fluidized bed 21 through a plurality of nozzles 211, blowing hot air into the fluidized bed 21, controlling the inflow amount of the hot air to enable the fluidized bed 21 to be in a bubbling fluidized bed state, and enabling the fly ash in the fluidized bed 21 to be in contact with the carbon dioxide absorbent waste liquid to obtain the adsorption material.
In a preferred embodiment, the carbon dioxide absorbent waste liquid contains ammonia, amide, imidazole, piperazine, and the like.
In a specific embodiment, in order to obtain the fly ash with the particle size corresponding to the carbon dioxide absorbent waste liquid, the high-efficiency mixing of the fly ash particles and the absorbent waste liquid is ensured, the carbon dioxide absorbent waste liquid is ensured to be uniformly and firmly adhered to the surface or the inside of the fly ash particles, and the mesh numbers of the primary screen 12 and the secondary screen 13 are respectively 20-30 meshes and 80-100 meshes.
In a preferred embodiment, in the step 2), when the fluidized bed 21 is in a bubbling fluidized bed state, the flow rate of the hot air is controlled so that the fluidization velocity of the fly ash is 2 to 3 times the critical fluidization velocity thereof. When the hot air inlet amount is in the range, the mixing rate and the bonding strength of the fly ash particles and the waste absorbent liquid can be improved.
In a specific embodiment, the method further comprises: after the preparation of the adsorbent, the fluidized bed 21 is switched to a pneumatic conveying bed state by increasing the amount of hot air, and the adsorbent is conveyed to a storage chamber through the adsorbent outlet 213. In the pneumatic transport bed state, the produced adsorbent is carried into the adsorbent outlet 213 from bottom to top by a high-velocity air flow and transported to the storage chamber.
In a preferred embodiment, the fluidized bed 21 is in a pneumatic transport bed state, and the amount of hot air is controlled so that the fluidization velocity of the fly ash is 6 to 10 times the critical fluidization wind velocity. When the hot air inlet amount is in the range, the speed of the prepared adsorption material moving from bottom to top can be increased, and meanwhile, the bonding strength between the fly ash particles and the waste absorbent liquid can not be influenced.
In a third aspect, the present invention provides an adsorption material prepared by the method described above, where the adsorption material is a porous adsorption material and can be used for adsorbing and removing heavy metals, organic matters, and the like in sewage.
The present invention will be described in detail by way of examples, but the scope of the present invention is not limited thereto.
The embodiment of the invention is implemented in a system for preparing an adsorption material by using the following carbon dioxide absorbent waste liquid and fly ash:
as shown in fig. 1, the system comprises a raw material screening bed 1, an adsorbent material preparing device 2 and a conveying device 3,
the top of the raw material screening bed 1 is provided with a raw material inlet 11, a primary screen 12 and a secondary screen 13 are sequentially arranged in the raw material screening bed 1 from top to bottom and are used for screening raw materials input through the raw material inlet 11, a collecting device 14 is arranged below the secondary screen 13, the bottom of the collecting device 14 is of a non-porous structure, the primary screen 12, the secondary screen 13 and the collecting device 14 are obliquely arranged, and the inclination angles a, b and c are 15-75 degrees;
the adsorption material preparation device 2 comprises a fluidized bed 21, a metering device 22, a blowing device 23 and a heating device 24, 4-12 nozzles 211 are arranged in the fluidized bed 21, the heights of a plurality of the nozzles 211 are lower than the height of the conveying device 3, absorbent waste liquid of the metering device 22 is sprayed into the fluidized bed 21 through the 4-12 nozzles 211, an air inlet 212 is arranged at the bottom of the fluidized bed 21, the blowing device 23 is used for blowing hot air heated by the heating device 24 into the fluidized bed 21 through the air inlet 212, the metering device 22 comprises an absorbent waste liquid supply device 221, a metering pump 222 and an even distributor 223 which are sequentially connected through pipelines, a heat source of the heating device 24 is from a reboiler condensate water of a carbon dioxide capturing system after combustion by a chemical absorption method, and the condensate water temperature is 110-120 ℃;
the conveying device 3 is positioned between the raw material screening bed 1 and the fluidized bed 21 and is used for conveying the raw materials on the secondary screen 13 into the fluidized bed 21, the conveying device 3 is in a belt shape, and baffle structures are arranged on two sides of the conveying device;
the system comprises a storage tank 4 and a descending pipe 5 which are connected with each other, wherein the descending pipe 5 is connected with the raw material screening bed 1 through a conduit, the system comprises an adsorption material storage device 6, an adsorption material outlet 213 is arranged at the top of the fluidized bed 21, and the adsorption material outlet 213 is connected with the adsorption material storage device 6 through a pipeline.
Example 1
1) The fly ash put into the raw material screening bed 1 is screened by the primary screen 12 and the secondary screen 13 in sequence, and then the fly ash remained on the secondary screen 13 is conveyed into the fluidized bed 21 by the conveying device 3, wherein the screen mesh numbers of the primary screen 12 and the secondary screen 13 are respectively 20 meshes and 50 meshes;
2) Spraying carbon dioxide absorbent waste liquid into the fluidized bed 21 through a plurality of nozzles 211, blowing hot air into the fluidized bed 21, controlling the flow of the hot air to control the fluidization speed of the fly ash to be 2 times of the critical fluidization wind speed of the fly ash, and enabling the fluidized bed 21 to be in a bubbling fluidized bed state, wherein the fly ash in the fluidized bed 21 is contacted with the carbon dioxide absorbent waste liquid to obtain an adsorption material, and the carbon dioxide absorbent waste liquid contains ammonia, amide, imidazole and piperazine;
3) After the preparation of the adsorption material is completed, the fluidization speed of the fly ash is controlled to be 8 times of the critical fluidization wind speed by increasing the inlet amount of hot air, so that the fluidized bed 21 is switched to a pneumatic conveying bed state, and the adsorption material is conveyed to a storage chamber through the adsorption material outlet 213.
Example 2
1) The fly ash put into the raw material screening bed 1 is screened by the primary screen 12 and the secondary screen 13 in sequence, and then the fly ash remained on the secondary screen 13 is conveyed into the fluidized bed 21 by the conveying device 3, wherein the screen mesh numbers of the primary screen 12 and the secondary screen 13 are respectively 20 meshes and 50 meshes;
2) Spraying carbon dioxide absorbent waste liquid into the fluidized bed 21 through a plurality of nozzles 211, blowing hot air into the fluidized bed 21, controlling the flow of the hot air to control the fluidization speed of the fly ash to be 3 times of the critical fluidization wind speed of the fly ash, and enabling the fluidized bed 21 to be in a bubbling fluidized bed state, wherein the fly ash in the fluidized bed 21 is contacted with the carbon dioxide absorbent waste liquid to obtain an adsorption material, and the carbon dioxide absorbent waste liquid contains ammonia, amide, imidazole and piperazine;
3) After the preparation of the adsorption material, increasing the inlet amount of hot air to control the fluidization speed of the fly ash to be 8 times of the critical fluidization wind speed of the fly ash, so that the fluidized bed 21 is switched into a pneumatic conveying bed state, and the adsorption material is conveyed to a storage chamber through the adsorption material outlet 213.
Example 3
1) The fly ash put into the raw material screening bed 1 is screened by the primary screen 12 and the secondary screen 13 in sequence, and then the fly ash remained on the secondary screen 13 is conveyed into the fluidized bed 21 by the conveying device 3, wherein the screen mesh numbers of the primary screen 12 and the secondary screen 13 are respectively 50 meshes and 100 meshes;
2) Spraying carbon dioxide absorbent waste liquid into the fluidized bed 21 through a plurality of nozzles 211, blowing hot air into the fluidized bed 21, controlling the flow of the hot air to control the fluidization speed of the fly ash to be 3 times of the critical fluidization wind speed of the fly ash, and enabling the fluidized bed 21 to be in a bubbling fluidized bed state, wherein the fly ash in the fluidized bed 21 is contacted with the carbon dioxide absorbent waste liquid to obtain an adsorption material, and the carbon dioxide absorbent waste liquid contains ammonia, amide, imidazole and piperazine;
3) After the preparation of the adsorption material is completed, the fluidization speed of the fly ash is controlled to be 8 times of the critical fluidization wind speed by increasing the inlet amount of hot air, so that the fluidized bed 21 is switched to a pneumatic conveying bed state, and the adsorption material is conveyed to a storage chamber through the adsorption material outlet 213.
Comparative example 1
The procedure of example 3 was followed except that step 1) was performed only to obtain sieved fly ash.
Test case
The adsorption performance of the adsorption material prepared in the example and the fly ash obtained in the comparative example were tested, and adsorption effect data are shown in table 1. The testing process comprises the following steps: the adsorption material prepared in example and the fly ash obtained in comparative example were first placed in an oven and dried under an air atmosphere at 110 ℃ for 4 hours, and then cooled in a drying vessel for standby. Preparing 4 200mL beakers, and adding 50mg/L Cr containing heavy metal respectively 6+ To each beaker was added one of the adsorption materials of examples and comparative examples, the pH of the solution was adjusted to 8, stirring was continued at room temperature for 80 minutes, and then heavy metal ion Cr in the solution was measured again 6+ Through the concentration of Cr 6+ Concentration difference calculation of Cr 6+ Is not limited, and the removal rate of the catalyst is not limited.
TABLE 1 treatment of adsorbent materials containing Cr 6+ Evaluation of wastewater Performance
Example 1 Example 2 Example 3 Comparative example 1
Removal rate/% 94.7 95.3 97.1 67.8
As can be seen from Table 1, the adsorption material prepared by the method of the invention has the following characteristics that 6+ The adsorption performance of the catalyst is obviously improved.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.

Claims (16)

1. A method for preparing an adsorption material by carbon dioxide absorbent waste liquid and fly ash is characterized in that the method is implemented by a system for preparing the adsorption material by carbon dioxide absorbent waste liquid and fly ash,
the system comprises a raw material screening bed (1), an adsorption material preparation device (2) and a conveying device (3),
the top of the raw material screening bed (1) is provided with a raw material inlet (11), and a primary screen (12) and a secondary screen (13) are sequentially arranged in the raw material screening bed (1) from top to bottom and are used for screening the fly ash raw materials input through the raw material inlet (11);
the adsorption material preparation device (2) comprises a fluidized bed (21), a metering device (22), a blowing device (23) and a heating device (24), wherein a plurality of nozzles (211) are arranged in the fluidized bed (21), the heights of the nozzles (211) are lower than the height of the conveying device (3), waste absorbent liquid of the metering device (22) is sprayed into the fluidized bed (21) through the nozzles (211), an air inlet (212) is formed in the bottom of the fluidized bed (21), and the blowing device (23) is used for blowing hot air heated by the heating device (24) into the fluidized bed (21) through the air inlet (212);
the conveying device (3) is positioned between the raw material screening bed (1) and the fluidized bed (21) and is used for conveying the fly ash raw material on the secondary screen (13) into the fluidized bed (21);
the method comprises the following steps:
1) sieving the fly ash put into the raw material sieving bed (1) through the primary sieve (12) and the secondary sieve (13) in sequence, and then conveying the fly ash remained on the secondary sieve (13) into the fluidized bed (21) through the conveying device (3);
2) Spraying carbon dioxide absorbent waste liquid into the fluidized bed (21) through a plurality of nozzles (211), blowing hot air into the fluidized bed (21), controlling the feeding amount of the hot air to enable the fluidized bed (21) to be in a bubbling fluidized bed state, and enabling fly ash in the fluidized bed (21) to be in contact with the carbon dioxide absorbent waste liquid to obtain an adsorption material;
the carbon dioxide absorbent waste liquid contains ammonia, amide, imidazole and piperazine.
2. A method according to claim 1, characterized in that a collecting device (14) is arranged below the secondary screen (13), and the bottom of the collecting device (14) is of a non-porous structure for collecting fly ash raw material below the secondary screen (13).
3. A method according to claim 2, characterized in that the system further comprises a tank (4) and a down-comer (5) connected to each other, the down-comer (5) and the raw material screening bed (1) being connected by means of a conduit for introducing raw material on the primary screen (12) and/or fly ash raw material below the secondary screen (13) into the down-comer (5).
4. A method according to claim 3, characterized in that the primary screen (12), the secondary screen (13) and the collecting device (14) are arranged obliquely.
5. The method according to claim 4, characterized in that the inclination angle a of the primary screen (12), the inclination angle b of the secondary screen (13) and the inclination angle c of the collecting device (14) are 15-75 °.
6. The method according to claim 5, characterized in that the inclination angle a of the primary screen (12), the inclination angle b of the secondary screen (13) and the inclination angle c of the collecting device (14) are 30-60 °.
7. Method according to claim 1, characterized in that the conveyor means (3) are strip-like, plate-like or tubular construction means provided with baffle structures on both sides.
8. A method according to claim 7, characterized in that the conveyor (3) is provided with openings at both ends, one end opening communicating with the raw material screening bed (1) and the other end opening communicating with the fluidized bed (21), and that the conveyor (3) has a higher level at the end communicating with the raw material screening bed (1) than at the end communicating with the fluidized bed (21).
9. The method according to claim 1, characterized in that the metering device (22) comprises an absorbent waste liquid supply device (221), a metering pump (222) and an even distributor (223) connected in sequence by means of a pipe, the even distributor (223) being used for equally distributing the absorbent waste liquid from the metering pump (222) into several of the nozzles (211).
10. The method according to claim 1, characterized in that the system further comprises an adsorbent material storage device (6), the top of the fluidized bed (21) being provided with an adsorbent material outlet (213), the adsorbent material outlet (213) being connected to the adsorbent material storage device (6) by a pipe.
11. The method according to claim 1, wherein the heat source of the heating device (24) is from condensed water of a reboiler of a regeneration tower of a carbon dioxide capturing system after combustion by a chemical absorption method, and the condensed water temperature is 110-120 ℃.
12. The method according to claim 1, characterized in that the screen mesh number of the primary screen (12) and the secondary screen (13) is 20-30 and 80-100 mesh, respectively.
13. The method according to claim 1, wherein in step 2), when the fluidized bed (21) is in a bubbling fluidized bed state, the flow rate of hot air is controlled so that the fluidization velocity of fly ash is 2 to 3 times the critical fluidization wind velocity thereof.
14. The method according to claim 1, characterized in that the method further comprises: after the preparation of the adsorption material is finished, the ventilation quantity of hot air is increased to enable the fluidized bed (21) to be switched into a pneumatic conveying bed state, and the adsorption material is conveyed to a storage chamber through the adsorption material outlet (213).
15. The method according to claim 14, wherein the fluidization velocity of the fly ash is controlled to be 6 to 10 times the critical fluidization velocity thereof when the fluidized bed (21) is in a pneumatic transport bed state.
16. The adsorbent material prepared by the method of any one of claims 1-15, wherein the adsorbent material is a porous adsorbent material.
CN202210725739.3A 2022-06-23 2022-06-23 System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash Active CN115025751B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210725739.3A CN115025751B (en) 2022-06-23 2022-06-23 System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210725739.3A CN115025751B (en) 2022-06-23 2022-06-23 System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash

Publications (2)

Publication Number Publication Date
CN115025751A CN115025751A (en) 2022-09-09
CN115025751B true CN115025751B (en) 2023-10-27

Family

ID=83126113

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210725739.3A Active CN115025751B (en) 2022-06-23 2022-06-23 System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash

Country Status (1)

Country Link
CN (1) CN115025751B (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1044706A (en) * 1973-11-16 1978-12-19 Leonard J. Minnick Structural materials based on lime-fly ash-sulfite compositions
KR19980054408A (en) * 1996-12-27 1998-09-25 우덕창 Coal Ash Purification System Using Heat Treatment
CN102274703A (en) * 2011-05-31 2011-12-14 山东奥诺能源科技有限公司 Large-scale continuous energy-saving fluidized bed spraying, granulating and drying process
CN102784589A (en) * 2012-09-03 2012-11-21 青岛科技大学 Nonmetal particle fluidized bed coating device and method for waste circuit board
CN205528602U (en) * 2016-04-14 2016-08-31 无锡亿恩科技股份有限公司 Built -in hot fluidized bed coal humidifying device of clean high -efficient step screening
CN210022801U (en) * 2019-04-12 2020-02-07 山东立鑫建材有限公司 Fly ash multi-stage screening device
JP6722839B1 (en) * 2019-03-18 2020-07-15 株式会社トクヤマ Method of modifying fly ash
CN211515118U (en) * 2019-10-30 2020-09-18 四川宝船建筑科技有限责任公司 Screening post-treatment device after sintering of fly ash ceramsite
CN113713778A (en) * 2021-10-17 2021-11-30 盐城师范学院 For CO2Preparation method of captured alcohol amine modified fly ash adsorbent
CN215743666U (en) * 2021-04-25 2022-02-08 江西金辉锂业有限公司 Fly ash production that can pulverize for two times uses multi-stage screening plant
CN114130553A (en) * 2021-10-27 2022-03-04 中国石油化工集团有限公司 Fly ash preparation system and preparation process
CN114133072A (en) * 2021-12-16 2022-03-04 中国华能集团清洁能源技术研究院有限公司 System and method for treating waste liquid containing carbon dioxide trapping absorbent
CN114456852A (en) * 2021-12-23 2022-05-10 中煤地第二勘探局集团有限责任公司 Waste liquid treatment method for blast furnace gas carbon capture

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7047894B2 (en) * 1999-11-02 2006-05-23 Consolidated Engineering Company, Inc. Method and apparatus for combustion of residual carbon in fly ash

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1044706A (en) * 1973-11-16 1978-12-19 Leonard J. Minnick Structural materials based on lime-fly ash-sulfite compositions
KR19980054408A (en) * 1996-12-27 1998-09-25 우덕창 Coal Ash Purification System Using Heat Treatment
CN102274703A (en) * 2011-05-31 2011-12-14 山东奥诺能源科技有限公司 Large-scale continuous energy-saving fluidized bed spraying, granulating and drying process
CN102784589A (en) * 2012-09-03 2012-11-21 青岛科技大学 Nonmetal particle fluidized bed coating device and method for waste circuit board
CN205528602U (en) * 2016-04-14 2016-08-31 无锡亿恩科技股份有限公司 Built -in hot fluidized bed coal humidifying device of clean high -efficient step screening
JP6722839B1 (en) * 2019-03-18 2020-07-15 株式会社トクヤマ Method of modifying fly ash
CN210022801U (en) * 2019-04-12 2020-02-07 山东立鑫建材有限公司 Fly ash multi-stage screening device
CN211515118U (en) * 2019-10-30 2020-09-18 四川宝船建筑科技有限责任公司 Screening post-treatment device after sintering of fly ash ceramsite
CN215743666U (en) * 2021-04-25 2022-02-08 江西金辉锂业有限公司 Fly ash production that can pulverize for two times uses multi-stage screening plant
CN113713778A (en) * 2021-10-17 2021-11-30 盐城师范学院 For CO2Preparation method of captured alcohol amine modified fly ash adsorbent
CN114130553A (en) * 2021-10-27 2022-03-04 中国石油化工集团有限公司 Fly ash preparation system and preparation process
CN114133072A (en) * 2021-12-16 2022-03-04 中国华能集团清洁能源技术研究院有限公司 System and method for treating waste liquid containing carbon dioxide trapping absorbent
CN114456852A (en) * 2021-12-23 2022-05-10 中煤地第二勘探局集团有限责任公司 Waste liquid treatment method for blast furnace gas carbon capture

Also Published As

Publication number Publication date
CN115025751A (en) 2022-09-09

Similar Documents

Publication Publication Date Title
CN103816780B (en) A kind of low-temperature flue gas desulphurization denitration is except ammonia integral process
CN105413326B (en) A kind of activated coke flue gas purification system
CN103816796A (en) Low-temperature coke oven flue waste gas desulphurization and denitration process
CN102380308A (en) Sintering flue gas desulfurization and purification method and equipment
CN103785275A (en) Desulfurization, dedusting and denitration integrated flue-gas purifier
CN105854479A (en) Ammonia-process flue gas desulfurization device and method achieving efficient aerosol removal
CN105668832A (en) Desulfurization wastewater treatment system and method
CN205199299U (en) Active burnt gas cleaning system
CN102580461B (en) Activated carbon continuous sorption-desorption device for movable bed
CN213112594U (en) Hot air distributor for rotary spray evaporation of desulfurization wastewater
CN108014613A (en) A kind of damp dry type flue gas purifying system and method based on Carbon Materials oxidation and denitration
CN109179545B (en) Device system for treating desulfurization wastewater by using flue gas waste heat of power plant
CN115025751B (en) System and method for preparing adsorption material from carbon dioxide absorbent waste liquid and fly ash
CN102266718A (en) Semi dry process flue gas desulfurization method of circulating fluidized bed based on circulation, and apparatus thereof
CN203777911U (en) Desulfuration, dedusting and denitration integrated flue gas cleaner
CN111991991A (en) Active coke turbulent bed desulfurization tower, system and method
CN108499315A (en) Integrated apparatus and method for removing non-ferrous metal metallurgy relieving haperacidity sulfureous in flue gas oxide and heavy metal
CN203853017U (en) Desulfurization and denitrification device for low-temperature waste gas of flue of coke oven
CN212091673U (en) Front-mounted dry desulphurization CFB desulphurization device
CN108043202A (en) For the absorption tower of fume treatment and using its smoke processing system and method
CN209828492U (en) Flue gas purification treatment device in renewable energy power generation system
CN210356493U (en) Tail-end dehydration fine dust removal device of flue gas based on phase transition
CN210473558U (en) Desulfurization, denitrification and whitening integrated system for sintering machine
CN203725003U (en) Novel sintering flue gas desulfurization and denitrification integrated equipment
CN208115413U (en) A kind of asphalt mixing plant gathers materials the processing unit of heating process carbon emission

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant