CN102728332A - Regeneration method of desulphurization, denitration and demercuration combined activated coke and special-purpose device thereof - Google Patents
Regeneration method of desulphurization, denitration and demercuration combined activated coke and special-purpose device thereof Download PDFInfo
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- CN102728332A CN102728332A CN2012102106919A CN201210210691A CN102728332A CN 102728332 A CN102728332 A CN 102728332A CN 2012102106919 A CN2012102106919 A CN 2012102106919A CN 201210210691 A CN201210210691 A CN 201210210691A CN 102728332 A CN102728332 A CN 102728332A
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Abstract
The invention discloses a regeneration method of desulphurization, denitration and demercuration combined activated coke and a special-purpose device thereof. The regeneration device comprises a tilting furnace and a material cooler. The tilting furnace is arranged aslant relative to the horizontal plane and a feed inlet of the tilting furnace is higher than a discharge port of the tilting furnace. The feed inlet of the tilting furnace is provided with a feed bin which communicates with a ring cavity of the tilting furnace. The material cooler communicates with the ring cavity of the tilting furnace. The juncture is near the discharge port of the tilting furnace. The invention provides the method for regenerating activated coke by the use of the above device. In comparison with processing capacity of an industrial vertical regeneration reactor, the processing capacity of the tilting furnace in the regeneration device provided by the invention is greatly raised. The device is especially suitable for an utility boiler or other large-scale boiler by large-scale adoption of a flue gas purification technology with activated coke.
Description
Technical field
The present invention relates to a kind of renovation process and isolated plant thereof of combined desulfurization and denitration demercuration activated coke.
Background technology
The activated coke flue gases purification is a kind of advanced person's a dry method flue gases purification, and this technology desulfurization, denitration, demercuration efficient are high, and subtractive process is consume water not basically, is adapted at China water-deficient area and applies; Recycle but remove the product resource, can alleviate the present situation of present China sulphur shortage of resources to a certain extent; The adsorbent that adopts is a primary raw material with the relative abundant in coal of China's reserves, and raw material supply has sufficient the assurance.Therefore, this technology is a kind of suitable China's national situation, the efficient and economic pollutant combined control technology of coal-fired flue-gas.
Activated coke after the gas cleaning is owing to adsorbed a large amount of SO
2(existing) with sulfuric acid or sulfurous acid form, need regeneration could recover the adsorption activity of activated coke, generally adopt thermal regeneration.Can discharge SO in the activated coke regenerative process
2And recover active, what discharge is rich in SO
2(V/V:20% ~ 40%) gas can be used as industrial chemicals and recycles, and its processing technology is all very ripe, can produce the multiple commercial grades that contains element sulphur according to the market demand, like sulfuric acid, elemental sulfur, chemical fertilizer, liquid SO
2Or other Containing Sulfur chemical product etc., environment is not caused secondary pollution.
The activated coke regeneration techniques of industrial applications mainly adopts the vertical type regeneration reactor at present; Need the activated coke of regeneration to add through the top of transport from regeneration reactor; Effect at gravity slowly moves down then; In this process, feed steam activated coke is carried out indirect, the activated coke of accomplishing regeneration turns back to through transport and removes reactor, carries out recycle.Mainly there is following shortcoming in this type of vertical type regeneration reactor:
(1) because the activated coke thermal conductivity factor is little; Heat transfer property is poor, therefore needs time enough to conduct heat and just can reach the activated coke regeneration temperature, and activated coke is in relative static conditions in regeneration reactor; This just causes the disposal ability of this type of regeneration reactor less relatively; For the enterprise of this type of flue gases purification of wide-scale adoption, need to build many cover regeneration reactors and could mate activated coke regeneration scale, have bigger inferior position thereby make the energy consumption of this kind equipment and take up an area of.
(2),, the device sealing causes reactor generation firing accident in case perhaps receiving the entering of regeneration gas corrosion may causing air because activated coke is slower in this type of regeneration reactor decrease speed, and the subregion temperature may sharply raise.
(3) flexibility is relatively poor; In order to increase the activated coke heat transfer property, regeneration reactor is inner must arrange many pipelines (pipeline conveying heated air), and this just causes this type of regenerative response structure relative complex; Processing characteristics is had relatively high expectations, and it is bigger to want to increase activated coke Regeneration Treatment ability difficulty.
Summary of the invention
The renovation process and the isolated plant thereof that the purpose of this invention is to provide a kind of combined desulfurization and denitration demercuration activated coke.
The regenerating unit of a kind of combined desulfurization and denitration demercuration activated coke provided by the present invention comprises rotary furnace and material cooler;
Said rotary furnace is provided with for the mode that tilts with horizontal plane, and the feed inlet end of said rotary furnace is higher than the discharge port end of said rotary furnace; The feed inlet end of said rotary furnace is provided with feeding warehouse, and said feeding warehouse is connected with the ring cavity of said rotary furnace; Said material cooler is connected with the ring cavity of said rotary furnace, and the discharge port end of nearly said rotary furnace is located in this connection place.
In the above-mentioned combined desulfurization and denitration demercuration activated coke regenerating unit, the angle that said rotary furnace tilts can be 1 ° ~ 5 °, helps activated coke along with the rotation of said rotary furnace is slowly moved to discharge port end by its feed inlet end.
In the above-mentioned combined desulfurization and denitration demercuration activated coke regenerating unit, said material cooler can be connected with the desalted water preheater, carries out UTILIZATION OF VESIDUAL HEAT IN.
In the above-mentioned combined desulfurization and denitration demercuration activated coke regenerating unit, said regenerating unit also comprises inert gas fire-fighting system, and said inert gas fire-fighting system is connected with the rotary furnace discharge end.
The present invention further provides a kind of combined desulfurization and denitration demercuration reactive coke regeneration method, comprises the steps: to utilize above-mentioned regenerating unit to treat regeneration activity Jiao and regenerates, the activated coke after obtaining regenerating; When treating that regeneration activity is burnt and getting into said regenerating unit and regenerate, in said regenerating unit, feed heat medium said.
In the above-mentioned renovation process, said heat medium can be hot flue gas, hot waste gas, middle pressure steam, hot-air or hot nitrogen.
In the above-mentioned renovation process, the regeneration route of said activated coke is: treat that regeneration activity Jiao enters to the ring cavity of said rotary furnace from said feeding warehouse; Saidly treat that regeneration activity Jiao regenerates under the heat radiation of said heat medium, and, enter to then in the said material cooler and cool off the activated coke after promptly obtaining regenerating along with the rotation of said rotary furnace is moved to the discharge port end of said rotary furnace;
The flow route of said heat medium is: said heat medium gets in the body of heater of said rotary furnace from the discharge port end of said rotary furnace; In said body of heater, said heat medium and saidly treat that regeneration activity Jiao carries out exchange heat, draws from the feed inlet end of said rotary furnace then.
In the above-mentioned renovation process, when said heat medium was hot flue gas or hot waste gas, said heat medium entered to the gas cleaning reactor after the feed inlet end of said rotary furnace is drawn, and after purifying, discharged.
In the above-mentioned renovation process, when said heat medium was middle pressure steam, said heat medium utilized from entering to the low-pressure steam pipe network after the feed inlet end of said rotary furnace is drawn again.
In the above-mentioned renovation process, when said heat medium was hot-air or hot nitrogen, said heat medium was discharged after recycle after the hot-blast stove heating from the feed inlet end of said rotary furnace.
In the above-mentioned renovation process, the temperature of said heat medium can be 300 ℃ ~ 500 ℃, as 450 ℃.
Apparatus and method provided by the invention have following advantage:
(1) adopt rotary furnace, activated coke can and be rolled up and down along with the body of heater rotation, promotes the activated coke heat absorption, thereby impels activated coke regeneration fully;
(2) heat medium does not directly contact with material, and the regeneration tail gas discharged contains SO
2Measure higher (volume ratio: 20% ~ 40%), can directly extract from the body of heater discharge end and be used to produce sulfuric acid or other chemical products, realize that the resource of refuse is recycled;
(3) continous way regeneration, automaticity is high, can be according to the regenerate size of scale flexible design rotary furnace of activated coke;
(4) disposal ability of vertical type regeneration reactor in the industry, the rotary furnace disposal ability is greatly improved, and is particularly suitable for boiler of power plant or other large-sized boiler of wide-scale adoption activated coke flue gases purification;
(5) energy-conservation.Indirect air cooling is adopted in the material cooling, in water saving, can be used for the preheating of desalted water, has significantly reduced energy consumption; As adopt hot-air (hot nitrogen) as heat medium, and can recycle, saved a large amount of heat energy.
(6) be difficult for taking place burning in the activated coke regenerative process and wait peril.Than the vertical type regeneration reactor; May be bigger owing to the frictional force between the material; Cause slow perhaps accumulation of activated coke decrease speed not descend; Thereby the temperature that causes accumulation place activated coke sharply raises and causes that peril takes place, and material can produce vibrations or piles up in burner hearth in centripetal force and the used material that can not cause down of gravity at the body of heater rotation process in this inventive method, greatly reduces the generation of peril.
(7) rotary furnace is equipped with inert gas fire-fighting system, in case occur leaking, makes air get into activated coke material channel situation and causes the activated coke burning, can start the inert gas fire-fighting protective device and avoid accident to take place.
Description of drawings
Fig. 1 is the structural representation of activated coke regenerating unit provided by the invention.
Sketch map when Fig. 2 carries out activated coke regeneration for activated coke regenerating unit provided by the invention; Sketch map when wherein, Fig. 2 a representes that heat medium is hot flue gas or other hot waste gas; Sketch map when Fig. 2 b representes that heat medium is hot-air or hot nitrogen; Sketch map when Fig. 2 c representes that heat medium is middle pressure steam.
Interior heat medium of rotary furnace and activated coke flowed to sketch map when Fig. 3 carried out activated coke regeneration for activated coke regenerating unit provided by the invention.
Each mark is following among the figure: 1 feeding warehouse, 2 rotary furnaces, 3 material coolers, 4 gas cleaning reactors, 5 screening plants, 6 air-introduced machines, 7 air blasts, 8 desalted water preheaters, 9 hot-blast stoves, 10 air blasts.
The specific embodiment
Employed experimental technique is conventional method like no specified otherwise among the following embodiment.
Used material, reagent etc. like no specified otherwise, all can obtain from commercial sources among the following embodiment.
The used activated coke of the following embodiment of the present invention is bought the emerging charcoal industry Co., Ltd in section.
SO in the flue gas among the following embodiment of the present invention
2The SO that adopts Beijing BAIF-Maihak Analytical Instrument Co., Ltd. to produce
2Infrared analyzer, model are QGS-08B.Flue gas after the desulfurization is introduced analytical instrument, and analytical instrument is measured SO in the flue gas automatically
2Concentration is passed to computer with signal then data is preserved.
The regenerating unit of embodiment 1, combined desulfurization and denitration demercuration activated coke
As depicted in figs. 1 and 2, the regenerating unit of combined desulfurization and denitration demercuration activated coke provided by the invention comprises rotary furnace 2 and material cooler 3; Rotary furnace 2 is provided with for the mode that tilts with horizontal plane, and the angle of inclination is 5 °, and the feed inlet end of rotary furnace 2 is higher than its discharge port end, helps activated coke slowly to be moved to discharge port end by its feed inlet end along with the rotation of said rotary furnace; The feed inlet end of rotary furnace 2 is provided with feeding warehouse 1, and feeding warehouse 1 is connected with the ring cavity of rotary furnace 2, treats that regeneration activity Jiao regenerates from this feeding warehouse enters to the ring cavity of rotary furnace 2; Material cooler 3 is connected with the ring cavity of rotary furnace 2, and the discharge port end near rotary furnace 2 is located in this connection place, and the activated coke after the regeneration gets in the material cooler 3 from this connection cools off recovery; Wherein, material cooler 3 is connected with desalted water preheater 8, to carry out UTILIZATION OF VESIDUAL HEAT IN; This regenerating unit also comprises an inert gas fire-fighting system (not shown), and it is connected with rotary furnace 2 discharge ends.
The regeneration of embodiment 2, activated coke
Shown in Fig. 2 a, utilize hot flue gas or hot waste gas as heat medium, use the above-mentioned regenerating unit that provides to carry out the regeneration of activated coke, detailed process is: in gas cleaning reactor 4, activated coke is carried out desulfurizing and purifying to flue gas; Enter in the feeding warehouse 1 after discharging from the bottom of gas cleaning reactor 4 then, enter to then in the ring cavity of rotary furnace 2; Simultaneously, heat medium under the effect of air-introduced machine 6 (hot flue gas or hot waste gas, temperature are 450 ℃) enters in the body of heater of rotary furnace 2 from the discharge port end of rotary furnace 2; Activated coke rotation along with rotary furnace 2 in rotary furnace 2 is slowly moved to its discharge port end, and then in rotary furnace 2, activated coke and heat medium move toward one another are also carried out heat exchange, and as shown in Figure 3, activated coke is desorption SO under thermal-radiating effect
2Regeneration; Hot flue gas or hot waste gas enter to after the feed inlet end of rotary furnace 2 is discharged and purify the back discharge the gas cleaning reactor 4; Activated coke after the regeneration enters to the material cooler 3 after the discharge port end of rotary furnace 2 is discharged to be cooled off, and under the effect of air blast 10, carries out indirect heat exchange, and the heat of recovery goes the 8 back dischargings of desalted water preheater, carries out UTILIZATION OF VESIDUAL HEAT IN; Cooled activated coke continues to enter in the screening plant 5, and the activated coke of qualified particle diameter can turn back in the gas cleaning reactor 4 and recycle, and replenishes the fresh activated coke of part, whole process SO simultaneously
2Removal efficiency can be stabilized between 95% ~ 98%.
Shown in Fig. 2 b, utilize hot-air or hot nitrogen as heat medium, use the above-mentioned regenerating unit that provides to carry out the regeneration of activated coke, detailed process is: in gas cleaning reactor 4, activated coke is carried out desulfurizing and purifying to flue gas; Enter in the feeding warehouse 1 after discharging from the bottom of gas cleaning reactor 4 then, enter to then in the ring cavity of rotary furnace 2; Simultaneously, heat medium under the effect of air-introduced machine 6 (hot-air or hot nitrogen, temperature are 450 ℃) enters in the body of heater of rotary furnace 2 from the discharge port end of rotary furnace 2; Activated coke rotation along with rotary furnace 2 in rotary furnace 2 is slowly moved to its discharge port end, and then in rotary furnace 2, activated coke and heat medium move toward one another are also carried out heat exchange, and as shown in Figure 3, activated coke is desorption SO under thermal-radiating effect
2Regeneration; Hot-air or hot nitrogen recycle after temperature required from entering to after the feed inlet end of rotary furnace 3 is discharged to be heated in the hot-blast stove 9, as required, can suitably replenish air (perhaps nitrogen); Activated coke after the regeneration enters to the material cooler 4 after the discharge port end of rotary furnace 3 is discharged to be cooled off, and under the effect of air blast 10, carries out indirect heat exchange, and the heat of recovery goes the 8 back dischargings of desalted water preheater, carries out UTILIZATION OF VESIDUAL HEAT IN; Cooled activated coke continues to enter in the screening plant 5, and the activated coke of qualified particle diameter can turn back in the gas cleaning reactor 4 and recycle, and replenishes the fresh activated coke of part, whole process SO simultaneously
2Removal efficiency can be stabilized between 95% ~ 98%.
Shown in Fig. 2 c, utilize middle pressure steam as heat medium, use the above-mentioned regenerating unit that provides to carry out the regeneration of activated coke, detailed process is: in gas cleaning reactor 4, activated coke is carried out desulfurizing and purifying to flue gas; Enter in the feeding warehouse 1 after discharging from the bottom of gas cleaning reactor 4 then, enter to then in the ring cavity of rotary furnace 2; Simultaneously, heat medium (middle pressure steam, temperature are 450 ℃) enters in the body of heater of rotary furnace 2 from the discharge port end of rotary furnace 2; Activated coke rotation along with rotary furnace 2 in rotary furnace 2 is slowly moved to its discharge port end, and then in rotary furnace 2, activated coke and heat medium move toward one another are also carried out heat exchange, and as shown in Figure 3, activated coke is desorption SO under thermal-radiating effect
2Regeneration; Middle pressure steam goes the low-pressure steam pipe network to utilize after the feed inlet end of rotary furnace 2 is discharged again; Activated coke after the regeneration enters to the material cooler 3 after the discharge port end of rotary furnace 2 is discharged to be cooled off, and under the effect of air blast 10, carries out indirect heat exchange, and the heat of recovery goes the 8 back dischargings of desalted water preheater, carries out UTILIZATION OF VESIDUAL HEAT IN; Cooled activated coke continues to enter in the screening plant 5, and the activated coke of qualified particle diameter can turn back in the gas cleaning reactor 4 and recycle, and replenishes the fresh activated coke of part, whole process SO simultaneously
2Removal efficiency can be stabilized between 95% ~ 98%.
Claims (10)
1. the regenerating unit of a combined desulfurization and denitration demercuration activated coke, it is characterized in that: said regenerating unit comprises rotary furnace and material cooler;
Said rotary furnace is provided with for the mode that tilts with horizontal plane, and the feed inlet end of said rotary furnace is higher than the discharge port end of said rotary furnace; The feed inlet end of said rotary furnace is provided with feeding warehouse, and said feeding warehouse is connected with the ring cavity of said rotary furnace; Said material cooler is connected with the ring cavity of said rotary furnace, and the discharge port end of nearly said rotary furnace is located in this connection place.
2. regenerating unit according to claim 1 is characterized in that: the angle that said rotary furnace tilts is 1 ° ~ 5 °.
3. regenerating unit according to claim 1 and 2 is characterized in that: said material cooler is connected with the desalted water preheater; Said regenerating unit also comprises inert gas fire-fighting system, and said inert gas fire-fighting system is connected with the rotary furnace discharge end.
4. the renovation process of a combined desulfurization and denitration demercuration activated coke comprises the steps: to utilize among the claim 1-3 arbitrary said regenerating unit to treat regeneration activity Jiao and regenerates the activated coke after obtaining regenerating; When treating that regeneration activity is burnt and getting into said regenerating unit and regenerate, in said regenerating unit, feed heat medium said.
5. method according to claim 4 is characterized in that: said heat medium is hot flue gas, hot waste gas, middle pressure steam, hot-air or hot nitrogen.
6. according to claim 4 or 5 described methods, it is characterized in that: the regeneration route of said activated coke is: treat that regeneration activity Jiao enters to the ring cavity of said rotary furnace from said feeding warehouse; Saidly treat that regeneration activity Jiao regenerates under the heat radiation of said heat medium, and, enter to then in the said material cooler and cool off the activated coke after promptly obtaining regenerating along with the rotation of said rotary furnace is moved to the discharge port end of said rotary furnace;
The flow route of said heat medium is: said heat medium gets in the body of heater of said rotary furnace from the discharge port end of said rotary furnace; In said body of heater, said heat medium and saidly treat that regeneration activity Jiao carries out exchange heat, draws from the feed inlet end of said rotary furnace then.
7. method according to claim 6 is characterized in that: when said heat medium was hot flue gas or hot waste gas, said heat medium entered to the gas cleaning reactor after the feed inlet end of said rotary furnace is discharged, after purifying, draw.
8. method according to claim 6 is characterized in that: when said heat medium was middle pressure steam, said heat medium utilized from entering to the low-pressure steam pipe network after the feed inlet end of said rotary furnace is discharged again.
9. method according to claim 6 is characterized in that: when said heat medium was hot-air or hot nitrogen, said heat medium was discharged after recycle after the hot-blast stove heating from the feed inlet end of said rotary furnace.
10. according to arbitrary described method among the claim 4-9, it is characterized in that: the temperature of said heat medium is 300 ℃ ~ 500 ℃.
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| CN103071474A (en) * | 2012-12-20 | 2013-05-01 | 北京国电清新环保技术股份有限公司 | Powdery coke desorption device and desorption method |
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| CN112495381A (en) * | 2020-11-23 | 2021-03-16 | 江苏新中金环保科技股份有限公司 | Preparation method for improving denitration performance of regenerated particle activated coke |
| CN112604719A (en) * | 2020-12-16 | 2021-04-06 | 华润环保发展有限公司 | System for regenerating waste catalyst and application thereof |
| CN113120871A (en) * | 2020-01-16 | 2021-07-16 | 吉林紫金铜业有限公司 | Method for heating desulfurization nitrogen in acid preparation by smelting flue gas |
| CN113426432A (en) * | 2021-07-07 | 2021-09-24 | 江苏磊金环境工程有限公司 | Production line and process for utilizing regenerated resources of saturated activated alumina pellets |
| CN113441123A (en) * | 2021-07-07 | 2021-09-28 | 江苏磊金环境工程有限公司 | Thermal desorption regeneration production line and process for saturated activated alumina pellets |
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Cited By (9)
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| CN103071474A (en) * | 2012-12-20 | 2013-05-01 | 北京国电清新环保技术股份有限公司 | Powdery coke desorption device and desorption method |
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| CN112495381A (en) * | 2020-11-23 | 2021-03-16 | 江苏新中金环保科技股份有限公司 | Preparation method for improving denitration performance of regenerated particle activated coke |
| CN112604719A (en) * | 2020-12-16 | 2021-04-06 | 华润环保发展有限公司 | System for regenerating waste catalyst and application thereof |
| CN112604719B (en) * | 2020-12-16 | 2023-07-04 | 华润环保发展有限公司 | System for regenerating waste catalyst and application thereof |
| CN113426432A (en) * | 2021-07-07 | 2021-09-24 | 江苏磊金环境工程有限公司 | Production line and process for utilizing regenerated resources of saturated activated alumina pellets |
| CN113441123A (en) * | 2021-07-07 | 2021-09-28 | 江苏磊金环境工程有限公司 | Thermal desorption regeneration production line and process for saturated activated alumina pellets |
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