CN203916678U - A kind of living beings carbon back demercuration adsorbent preparation facilities - Google Patents
A kind of living beings carbon back demercuration adsorbent preparation facilities Download PDFInfo
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- CN203916678U CN203916678U CN201420350655.7U CN201420350655U CN203916678U CN 203916678 U CN203916678 U CN 203916678U CN 201420350655 U CN201420350655 U CN 201420350655U CN 203916678 U CN203916678 U CN 203916678U
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Abstract
The utility model provides a kind of living beings carbon back demercuration adsorbent preparation facilities, comprises fixed bed system, modifier solution supply system, steam and nitrogen supply (NS) system, charging system, drainage system, exhaust gas purification system and corresponding connecting line.Wherein, fixed bed system is for carrying out pyrolysis, modifier solution dipping and the steam activation of living beings; Modifier solution supply system comprises modifier solution groove, constant flow pump, valve and atomizing lance; Steam comprises with nitrogen supply (NS) system nitrogen cylinder, pressure-reducing valve, mass flowmenter, triple valve, electric heater, counterbalance valve, constant flow pump and the tank being connected successively; Living beings charging system comprises feeding chamber and feed valve; Drainage system comprises filter and purifies liquid bath; Exhaust gas purification system comprises exhaust gas cleaner.The utility model is integrated in biomass pyrolytic, modifier solution dipping and steam activation in one covering device and carries out, thereby has effectively improved the production efficiency of demercuration adsorbent.
Description
Technical field
The utility model relates to a kind of living beings carbon back demercuration adsorbent preparation facilities, be a kind of integrated demercuration adsorbent preparation facilities that carries out biomass pyrolytic, modifier solution dipping and steam activation based on fixed bed specifically, belong to biomass resource comprehensive utilization and flue gas demercuration technical field.
Background technology
The discharge of artificial source Mercury In The Air is mainly derived from burning, the metalliferous mineral smelting of coal and mercurous rubbish and relates to mercury production industry (as battery, fluorescent lamp etc.).China's annual artificial source Mercury In The Air discharge capacity is about 500 ~ 600 tons at present, accounts for 25% left and right of global artificial source Mercury In The Air total emission volumn, and wherein the smoke mercury emission of coal fired power plant accounts for Mercury In The Air discharge 40%.Coal-burning power plant's Mercury In The Air pollutant has the discharge of concentrating and the large feature of total amount, and therefore, coal fired thermal power plant becomes the primary position that mercury pollution is administered.In coal combustion process, at flue gas, under the cooling and acting in conjunction such as flue gas composition and flying dust, in coal, mercury is finally with Elemental Mercury (Hg
0), oxidation state mercury (Hg
2+) and particle mercury (Hg
p) three kinds of forms exist.Oxidation state mercury is very easily water-soluble, can remove by wet scrubbing method, and particle mercury is also easily caught by cleaner, and gaseous elemental mercury (Hg
0) there is very strong volatility, be difficult to be caught by conventional Air Pollution Control equipment, and then enter atmosphere and long-term accumulation migration by all means in environment, cause serious ecological environment problem.
Coal-fired mercury pollution emission control comprises source control (coal separation, coal washing), combustion modifications and gas cleaning (wet scrubbing, sorbent injection etc.) three major types.At present, the technology that sorbent injection combines with existing conventional Air Pollution Control equipment is considered to have the coal-fired flue-gas mercury control technology of development prospect, and research and development low-cost, high efficiency mercury absorbent are one of keys of this technology successful Application.Conventional demercuration adsorbent has carbon-based adsorbent (active carbon, active carbon fibre peacekeeping biomass char etc.) and non-carbon-based adsorbent (flying dust, calcium base, mineral substance and metal species etc.).Living beings have that reserves are abundant, wide material sources, low-sulfur nitrogen, burnt active, zero CO of high ash
2the characteristics such as clean discharge, therefore, the research of biomass-based demercuration adsorbent preparation and mercury adsorption features thereof has been subject to countries in the world researcher's common concern.Patent CN 101220283B and CN 102226092A disclose respectively based on vertical and continuous biomass pyrolysis charring device horizontal operation principle, this retort has been realized continuous dosing, charing and has been gone out charcoal, significantly improved the production efficiency of biomass carbon, but the efficiency of the direct demercuration of above-mentioned biomass carbon is lower.In order to improve the demercuration efficiency of biomass pyrolysis product (biomass carbon), patent CN101985099B and patent CN103252212A propose respectively the method that adopts ammonium halide salt dipping and adopt pyrolysis, steam activation and solution impregnation modification to combine, to biomass carbon/biomass pyrolytic, Jiao carries out modification, result shows, after modification, the demercuration efficiency of adsorbent significantly improves.But existing technology does not all relate to the preparation facilities of living beings demercuration adsorbent.
Summary of the invention
Defect for prior art; the utility model proposes a kind of fixed bed biomass carbon back demercuration adsorbent preparation facilities; biomass pyrolytic, modifier solution dipping and steam activation are integrated in a covering device and are carried out; thereby effectively shortened the preparation flow of living beings carbon back demercuration adsorbent; improved the production efficiency of demercuration adsorbent, solved that the heat exhaustion existing in the preparation of living beings carbon back demercuration adsorbent is large, productive rate is low, the cycle is long and be difficult to the problems such as large-scale production.
In order to realize foregoing invention object, the technical solution of the utility model is:
A living beings carbon back demercuration adsorbent preparation facilities, comprises fixed bed system, modifier solution supply system, steam and nitrogen supply (NS) system, charging system, drainage system, exhaust gas purification system and corresponding connecting line; Described fixed bed system, for carrying out pyrolysis, modifier solution dipping and the steam activation of living beings, comprises high-temperature electric heating furnace, fixed bed body, intelligent temperature controller and thermocouple, and fixed bed body is arranged in high-temperature electric heating furnace; Described modifier solution supply system comprises modifier solution groove, constant flow pump, valve and atomizing lance, and modifier solution groove, constant flow pump and atomizing lance are connected successively, and atomizing lance inserts in fixed bed body; Described steam comprises with nitrogen supply (NS) system nitrogen cylinder, pressure-reducing valve, mass flowmenter, triple valve, electric heater, counterbalance valve, constant flow pump and the tank being connected successively, and described triple valve is also connected to fixed bed body; Described living beings charging system comprises feeding chamber and feed valve, and feeding chamber is connected to the top of fixed bed body by feed valve; Described drainage system comprises filter and purification liquid bath, and filter is arranged on the bottom of fixed bed body, is connected with purification liquid bath; Described exhaust gas purification system comprises exhaust gas cleaner, and exhaust gas cleaner is connected to the top of fixed bed body.
Described fixed bed body comprises fixed bed cylindrical shell, upper flange lid, lower flange lid, porous disc, silk screen and lifting screw, wherein, porous disc lies in a horizontal plane in fixed bed inner barrel, above porous disc, lay multi-layer silk screen, the bottom surface of porous disc is connected with lifting screw, in order to adjust the position of porous disc in fixed bed; The upper/lower terminal of fixed bed cylindrical shell is connected with lower flange lid with upper flange lid respectively; Lifting screw is through lower flange lid.
Described upper flange covers and offers 1 charging aperture, 2 gun holes, 1 flexible rake hole and 1 tail gas tap.
Described lower flange covers and offers 1 lifting screw hole, 1 outage and 1 steam and nitrogen and add hole.
Described fixed bed cylindrical shell is made by stainless steel tube or quartz glass tube, offers some diameters to be on porous disc
Φthe aperture of 2 ~ 4 mm, silk screen adopts 80 ~ 250 object stainless steel cloths.
Living beings carbon back demercuration adsorbent preparation facilities of the present utility model, take biomass material as object, high temperature pyrolysis, modifier solution dipping and steam-activation treatment in living beings have been carried out integrated, on the basis of middle high temperature pyrolysis charing, by modifier solution, flood and associating and the separating treatment process of steam activation, make respectively different types of biomass carbon base adsorbent: biomass pyrolytic is burnt, living beings dipping Jiao and living beings steam activation Jiao; Described living beings comprise agricultural crop straw (as straw, rice straw, cornstalk etc.), shell (as peanut shell, coconut husk etc.), leaf and wood chip etc.; For realizing the large-scale production of adsorbent, the operation that some cover fixed bed body apparatus can be combined, carries out the operation of pyrolysis, solution impregnation, steam activation, in turn further to shorten the production cycle.
Mechanism of the present utility model is: in biomass pyrolysis process, separating out of volatile matter can form larger hole, after halide salt (as KCl, KBr or KI) solution impregnation modification, can significantly increase the halogens content of adsorbent surface, pass through steam-activation treatment, can significantly improve specific area, microcellular structure and the surface oxygen functional group of adsorbent, and then improve biomass carbon base adsorbent to Elemental Mercury (Hg
0) chemisorbed and physical absorption ability.
The beneficial effects of the utility model are: biomass pyrolytic, modifier dipping and steam activation process are carried out reasonably integrated, simplified the preparation technology of adsorbent, realize integrated design and the operation of absorbent preparation device, improved practicality and the economy of equipment.This device takes full advantage of ripe fixed-bed pyrolysis charing and steam activation technology; optimize the overall performance of biomass carbon base adsorbent preparation facilities; overcome that the heat exhaustion existing in biomass carbon base adsorbent segmentation preparation process is large, productive rate is low, the cycle is long and be difficult to the problems such as large-scale production, has improved the utilization ratio of apparatus system.Device of the present utility model can be take renewable biomass resource as processing object, by pyrolysis, modifier solution dipping and steam-activation treatment, make biomass pyrolytic Jiao after modification there is the ability that efficiently removes Elemental Mercury in coal-fired and flue gas of refuse burning, there is significant economic benefit, environmental benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is living beings carbon back demercuration adsorbent preparation facilities schematic diagram;
Fig. 2 is fixed bed body construction schematic diagram;
Fig. 3 is upper flange lid structural representation;
Fig. 4 is lower flange lid structural representation.
Specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The utility model living beings carbon back demercuration adsorbent preparation facilities is comprised of fixed bed system, modifier solution supply system, steam and nitrogen supply (NS) system, charging system, drainage system and exhaust gas purification system, as shown in Figure 1.
Fixed bed system comprises high-temperature electric heating furnace 1, fixed bed body 2, intelligent temperature controller 3 and thermocouple 4, and fixed bed body 2 is arranged in high-temperature electric heating furnace 1, and high-temperature electric heating furnace 1 is provided with thermocouple 4, and is connected to external smart temperature controller 3; As shown in Figure 2, described fixed bed body 2 comprises fixed bed cylindrical shell 201, upper flange lid 202, lower flange lid 203, porous disc 204, stainless steel cloth 205 and lifting screw 206, described fixed bed cylindrical shell 201 is made by stainless steel tube or quartz ampoule, in fixed bed inner barrel, is horizontally disposed with
Φthe porous disc 204 of 2 ~ 4 mm, lays multilayer 80 ~ 250 object stainless steel cloths 205 on porous disc 204, for the living beings/biomass char in support fixed bed, and guarantee flowing through smoothly of steam and nitrogen; The bottom surface of porous disc 204 is connected with lifting screw 206, in order to adjust the position of porous disc 204 in fixed bed; Fixed bed cylindrical shell 201 two ends are connected with lower flange lid 203 with upper flange lid 202 respectively; As shown in Figure 3, on upper flange lid 202, offer charging aperture 2021, atomizing lance hole 2022, flexible rake hole 2023 and tail gas stream and portal 2024; As shown in Figure 4, lower flange covers and offers lifting screw hole 2031, outage 2032 and steam and nitrogen interpolation hole 2033.
Modifier supply system comprises modifier solution groove 15, constant flow pump 16, valve 17, atomizing lance 18 and corresponding connecting line, the insertion depth of atomizing lance 18 in fixed bed can appropriately adjust according to living beings feeding quantity, during modifier solution spray, can add as required a certain amount of compressed nitrogen assisted atomization, to realize best atomization and spraying effect.
Steam and nitrogen supply (NS) system comprise nitrogen cylinder 7, pressure-reducing valve 8, mass flowmenter 9, triple valve 10, tank 11, constant flow pump 12, counterbalance valve 13, electric heater 14 and corresponding connecting line; During biomass pyrolytic charing, close constant flow pump 12 and electric heater 14, only the supply of nitrogen; During steam activation, open constant flow pump 12 and electric heater 14, and regulate nitrogen flow, control suitable H
2o (g): N
2mol ratio, makes biomass char complete steam activation under setting atmosphere.
Living beings charging system comprises feed valve 5, feeding chamber 6 and corresponding connecting line.
Drainage system comprises filter 31, purifies liquid bath 32 and corresponding connecting line.Excessive spray modifier solution stream is collected in fixed bed bottom, regularly installs after filtration after 31 processing and is stored in and purifies in liquid bath 32, and scavenging solution can return to modifier solution groove 15 after metering to be continued to use.
Exhaust gas purification system comprises exhaust gas cleaner 30 and corresponding connecting line.
It is core that the utility model be take fixed bed body equipment, during practical application, a plurality of fixed bed body equipment can be combined, thereby in a covering device, carry out the different unit operations such as pyrolysis, solution impregnation, steam activation, to shorten the production cycle, realize the large-scale production of adsorbent.
Utilize the preparation method of said apparatus to comprise the steps:
(1) biomass material makes through pretreatment such as air-dry, fragmentation and screenings the biological particles raw material that particle diameter is less than 1 mm, and particulate material is added to feeding chamber 6; Close constant flow pump 16 and electric heater 14, the supply of nitrogen only, at N
2under atmosphere, fixed bed body 2 is warming up to 300 ℃ ~ 900 ℃, then opens feed valve 5, biological particles raw material is added rapidly in fixed bed, pyrolysis 10 ~ 30 min;
(2) after pyrolysis finishes, close intelligent temperature controller 3, continue to pass into N
2, and use the loosening biomass pyrolytic of flexible rake burnt, biomass pyrolytic Jiao is cooled to below 100 ℃; If take out, be crushed to below 0.5mm, make required biomass pyrolytic burnt;
(3) after cooling completing, close N
2, modifier solution is delivered to atomizing lance 18 through constant flow pump 16, can add a small amount of compressed nitrogen where necessary, to strengthen atomizing effect; In 1h, be interrupted atomizing spray to the burnt surface of biomass pyrolytic, use the loosening biomass pyrolytic of flexible rake burnt simultaneously, the biomass char in fixed bed is evenly flooded; Described modifier is KCl, KBr or KI, and the mass concentration of modifier is 0.5% ~ 5%, and the modification dosage of the burnt spray of every 100g biomass pyrolytic is 50 ~ 100 ml; After spray finishes, standing 4 ~ 12 h; If take out, dry (90 ℃), be crushed to below 0.5 mm, make required living beings dipping burnt;
(4) fixed bed body 2 is warming up to 700 ℃ ~ 900 ℃, opens constant flow pump 16 and electric heater 14, sample is carried out to steam activation, and regulate nitrogen flow, control H
2o (g): N
2mol ratio is 0.5 ~ 1.5, after steam activation finishes, closes steam supply system, continues to pass into N
2, sample is cooled to after room temperature, take out and be crushed to below 0.5mm, make required living beings steam activation burnt;
(5) excessive spray modifier is collected in the bottom of fixed bed body 2 after biomass char diafiltration, regularly installs after filtration 31 purified treatment and deposit in to purify in liquid bath 32, can return to modifier solution groove 15 and continue to use after metering.
Wherein, the enforcement of step (3) and step (4) order can be exchanged, to make different biomass carbon base adsorbents for different types of living beings.
Claims (5)
1. a living beings carbon back demercuration adsorbent preparation facilities, is characterized in that, comprises fixed bed system, modifier solution supply system, steam and nitrogen supply (NS) system, charging system, drainage system, exhaust gas purification system and corresponding connecting line;
Described fixed bed system, for carrying out pyrolysis, modifier solution dipping and the steam activation of living beings, comprises high-temperature electric heating furnace, fixed bed body, intelligent temperature controller and thermocouple, and fixed bed body is arranged in high-temperature electric heating furnace;
Described modifier solution supply system comprises modifier solution groove, constant flow pump, valve and atomizing lance, and modifier solution groove, constant flow pump and atomizing lance are connected successively, and atomizing lance inserts in fixed bed body;
Described steam comprises with nitrogen supply (NS) system nitrogen cylinder, pressure-reducing valve, mass flowmenter, triple valve, electric heater, counterbalance valve, constant flow pump and the tank being connected successively, and described triple valve is also connected to fixed bed body;
Described living beings charging system comprises feeding chamber and feed valve, and feeding chamber is connected to the top of fixed bed body by feed valve;
Described drainage system comprises filter and purification liquid bath, and filter is arranged on the bottom of fixed bed body, is connected with purification liquid bath;
Described exhaust gas purification system comprises exhaust gas cleaner, and exhaust gas cleaner is connected to the top of fixed bed body.
2. a kind of living beings carbon back demercuration adsorbent preparation facilities according to claim 1, it is characterized in that, described fixed bed body comprises fixed bed cylindrical shell, upper flange lid, lower flange lid, porous disc, silk screen and lifting screw, wherein, porous disc lies in a horizontal plane in fixed bed inner barrel, above porous disc, lay multi-layer silk screen, the bottom surface of porous disc is connected with lifting screw, in order to adjust the position of porous disc in fixed bed; The upper/lower terminal of fixed bed cylindrical shell is connected with lower flange lid with upper flange lid respectively; Lifting screw is through lower flange lid.
3. a kind of living beings carbon back demercuration adsorbent preparation facilities according to claim 2, is characterized in that, described upper flange covers and offers 1 charging aperture, 2 gun holes, 1 flexible rake hole and 1 tail gas tap.
4. according to a kind of living beings carbon back demercuration adsorbent preparation facilities described in claim 2 or 3, it is characterized in that, described lower flange covers and offers 1 lifting screw hole, 1 outage and 1 steam and nitrogen and add hole.
5. a kind of living beings carbon back demercuration adsorbent preparation facilities according to claim 2, is characterized in that, described fixed bed cylindrical shell is made by stainless steel tube or quartz glass tube, offers some diameters to be on porous disc
Φthe aperture of 2 ~ 4 mm, silk screen adopts 80 ~ 250 object stainless steel cloths.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420350655.7U CN203916678U (en) | 2014-06-26 | 2014-06-26 | A kind of living beings carbon back demercuration adsorbent preparation facilities |
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|---|---|---|---|
| CN201420350655.7U CN203916678U (en) | 2014-06-26 | 2014-06-26 | A kind of living beings carbon back demercuration adsorbent preparation facilities |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043395A (en) * | 2014-06-26 | 2014-09-17 | 南京师范大学 | Device and method for preparing biomass carbon-based demercuration adsorbents |
-
2014
- 2014-06-26 CN CN201420350655.7U patent/CN203916678U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043395A (en) * | 2014-06-26 | 2014-09-17 | 南京师范大学 | Device and method for preparing biomass carbon-based demercuration adsorbents |
| CN104043395B (en) * | 2014-06-26 | 2016-01-27 | 南京师范大学 | A kind of living beings carbon back demercuration adsorbent preparation facilities and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20160127 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |