CN106621809B - System and method for recovering waste heat of regeneration tower of active coke dry desulfurization device - Google Patents
System and method for recovering waste heat of regeneration tower of active coke dry desulfurization device Download PDFInfo
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- CN106621809B CN106621809B CN201710101898.5A CN201710101898A CN106621809B CN 106621809 B CN106621809 B CN 106621809B CN 201710101898 A CN201710101898 A CN 201710101898A CN 106621809 B CN106621809 B CN 106621809B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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Abstract
The invention discloses a system and a method for recovering waste heat of a regeneration tower of an active coke dry desulfurization device, wherein the system comprises the regeneration tower, a hot air circulating fan, a heat generator, a cooling fan, a sealed nitrogen pipeline, a plate heat exchanger and a rotary heat accumulating type heat exchanger; the sealed nitrogen pipeline is sequentially connected with the plate heat exchanger, the rotary heat accumulating type heat exchanger and the feed inlet of the regeneration tower; the sealed nitrogen at the top of the regeneration tower is used as a waste heat recovery carrier, and is respectively subjected to primary preheating and secondary preheating with air at the outlet of the cooling section of the regeneration tower and exhaust gas outside the heating section of the regeneration tower, and the sealed nitrogen is sent to the preheating section of the regeneration tower to realize the cascade recovery of waste heat; the discharged flue gas is sent to a flue gas main pipe at an outlet of the adsorption tower and is discharged by a chimney. The invention has the advantages of realizing waste heat recovery, improving the temperature of the sealed nitrogen entering the tower, the heat utilization rate of the regeneration tower and the activity Jiao Jin preheating section Jiao Wen, reducing the fuel consumption of the heat generator, improving the temperature of the resolved gas exiting the tower and avoiding the corrosion problem of the regenerated gas pipeline.
Description
Technical Field
The invention belongs to the technical field of flue gas desulfurization, and particularly relates to a system and a method for recovering waste heat of a regeneration tower of an active coke dry desulfurization device.
Background
The active coke dry desulfurization is to utilize the active coke and SO in the flue gas of the coal-fired boiler 2 Under the action, the sulfuric acid is generated by chemical reaction with water and oxygen in the flue gas. Adsorption of saturated SO 2 The obtained activity Jiao Zixi is added into a regeneration tower, flows through a preheating section, a resolving section and a cooling section respectively to recover the activity, and finally is sent back to an adsorption tower for cyclic adsorption through lifting equipment such as a conveyor.
In the prior art, the heat source of the resolving section of the regeneration tower is generally from the heat brought by the flue gas after the combustion of a heat generator (such as a hot blast stove and the like), and the temperature can reach more than 420 ℃; the heat source of the preheating section is waste heat from high-temperature flue gas of the hot blast stove after heat exchange of the analysis section, the temperature is also above 330 ℃, and the flue gas is split from the outlet (node B') of the preheating section: part of the flue gas is circulated into the heat generator through the hot air circulating fan and is mixed with high-temperature flue gas generated by fuel combustion again to return to the analysis section of the regeneration tower, and part of the flue gas (more than 20 percent) is discharged for ensuring the pressure in the heat generator, so that the heat is greatly wasted; the cooling section of the regeneration tower takes cold air as a cooling medium, the discharging temperature of the regeneration tower is controlled to be about 110 ℃, and the temperature of the outlet (node A') of the cooling section can reach more than 90-100 ℃ generally. Most of the production plants currently directly discharge the heat sources.
The analysis section of the regeneration tower generally requires that the temperature of the outlet gas reaches more than 350 ℃, so that the corrosion of the regenerated gas to the pipeline can be effectively avoided. In the actual production process, the temperature of the desorption gas is difficult to reach such a high temperature. The reason for this is mainly:
1) The analysis gas contains sealing nitrogen, a sealing nitrogen pipeline in the prior art is connected with heating equipment to preheat the nitrogen to about 100 ℃ and then is connected with a feed inlet of a regeneration tower, the temperature of the sealing nitrogen cannot be guaranteed to meet the process production requirement, and the temperature of the sealing nitrogen is too low to reduce the air temperature after being mixed with the analysis gas.
2) The water content in the active coke resolving process is large, and the evaporation latent heat of the water consumes much heat of high-temperature flue gas.
The prior art active coke dry desulfurization has the following defects:
1) The heat of the regeneration tower is directly discharged, and the utilization rate of the heat of the regeneration tower is only about 40 percent after preliminary measurement, so that the energy utilization rate is lower.
2) The exhaust temperature of the desulfurization and denitrification flue gas is too low, so that the phenomenon of dew formation occurs, and equipment corrosion is caused.
Therefore, how to design a waste heat recovery system of a regeneration tower of an active coke dry desulfurization device is a technical problem that needs to be solved currently by a person skilled in the art.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a recovery system and a recovery method for waste heat of a regeneration tower of an active coke dry desulfurization device, which are used for improving the temperature of a sealed nitrogen gas entering the tower in a step recovery mode of the waste heat of the regeneration tower and solving the problem of low heat utilization rate of the regeneration tower of the original system.
In order to achieve the above purpose, the invention adopts the following technical scheme: a waste heat recovery system of a regeneration tower of an active coke dry desulfurization device comprises the regeneration tower, a hot air circulating fan, a heat generator, a cooling fan and a sealing nitrogen pipeline, wherein the cooling fan is connected with an inlet of a cooling section of the regeneration tower; the waste heat recovery system is characterized in that a plate heat exchanger and a rotary heat accumulating type heat exchanger are arranged; the sealed nitrogen pipeline is sequentially connected with the plate heat exchanger, the rotary heat accumulating type heat exchanger and the feed inlet of the regeneration tower; the plate heat exchanger is connected with an outlet pipeline of a cooling section of the regeneration tower to perform primary preheating of sealed nitrogen; the rotary heat accumulating heat exchanger is connected with an exhaust gas outlet pipeline outside the preheating section of the regeneration tower to perform secondary preheating of sealed nitrogen.
Further improved, the plate heat exchanger adopts a parallel structure, the working pressure is higher than the nitrogen gas pressure, and the heat transfer plate adopts a horizontal flat corrugated plate.
Further improved, the heat medium in the plate heat exchanger is air (100 ℃) at the outlet of the cooling section of the regeneration tower, and the cold medium is nitrogen at normal temperature.
Further improved, a smoke pressure stabilizing box is arranged between the smoke outlet outside the heating section of the regeneration tower and the rotary heat accumulating type heat exchanger.
Further improved, the rotary heat accumulating type heat exchanger is divided into a smoke zone, a transition zone, a nitrogen zone and a transition zone along the rotor steering direction, and the proportion of the four zones to the section of the rotor is as follows: 1/2, 1/12, 1/3, and 1/12, the flue gas flow cross-sectional area is larger than the nitrogen flow cross-sectional area because the flue gas volume flow is larger than the nitrogen.
Further improved, the transition area of the rotary heat accumulating type heat exchanger is isolated in a nitrogen sealing mode, and smoke and nitrogen are isolated, so that the smoke and the nitrogen are not mixed with each other.
Further improved, the rotary heat accumulating heat exchanger also comprises a rotor heat accumulator, wherein the rotor heat accumulator is a corrugated plate which is pressed by a steel plate with the thickness of 0.5-1 mm, and a spacing positioning plate is arranged between the corrugated plates in an alternate arrangement mode.
In order to achieve the above purpose, the invention provides a method for recovering waste heat of a regeneration tower of an active coke dry desulfurization device, which is characterized in that normal-temperature sealing nitrogen carries out primary preheating through a plate heat exchanger and gas at the outlet (about 100 ℃) of a cooling section of the regeneration tower, then carries out secondary preheating through a rotary heat accumulating type heat exchanger and flue gas (about 330 ℃) discharged outside the heating section of the regeneration tower, and the sealing nitrogen is sent to the preheating section of the regeneration tower after being heated, thereby realizing the step recovery of the waste heat of the regeneration tower, and the specific steps are as follows:
1) The cooling fan blows cooling air to the cooling section of the regeneration tower, the temperature of air at the outlet (node A) of the cooling section can reach more than 90-100 ℃, and the heated air enters the plate heat exchanger to be preheated with sealing nitrogen for the first time, and the heat exchange mode is a convection heat exchange and heat conduction mode; the heat medium air is directly exhausted after heat exchange;
2) The heated sealing nitrogen can reach 40-50 ℃, the sealing nitrogen subjected to primary heating directly flows to the rotary heat accumulating type heat exchanger from the outlet (node D) of the plate heat exchanger through a pipeline, the heat source of the rotary heat accumulating type heat exchanger is from the exhaust smoke (node B) of the thermal circulating air system, the exhaust smoke obtains the heat of high-temperature smoke (330 ℃) through the smoke pressure stabilizing box and the heat accumulating plate of the rotary heat accumulating type heat exchanger, the heat accumulating carrier of the smoke area is transferred to the nitrogen area through the rotor, the sealing nitrogen flowing in from the outlet (node D) of the plate heat exchanger flows through the heated heat accumulating carrier, so that the aim of secondary preheating is fulfilled, and the sealing nitrogen flowing out of the nitrogen area (node E) of the rotary heat accumulating type heat exchanger is finally conveyed to the feeding hole of the regeneration tower;
3) The flue gas discharged from the outside is converged with the flue gas main pipe at the outlet of the adsorption tower through the outlet (node C) of the flue gas zone of the rotary heat accumulating type heat exchanger and discharged from the chimney, so that the temperature of the flue gas discharged from the outside can be increased, and the phenomenon of dew formation caused by the too low temperature of the flue gas discharged from the outside is avoided.
Compared with the prior art, the invention has the following advantages:
1) The method realizes the effective recovery and utilization of the waste heat of the regeneration tower, and improves the temperature of the sealing nitrogen entering the regeneration tower, thereby improving the activity Jiao Jiaowen of the preheating section of the regeneration tower, reducing the temperature rising temperature difference of the active coke of the heating section and saving the fuel consumption of the heat generator; the sealing nitrogen preheated by two stages can also indirectly improve the temperature of the resolved gas outlet of the regeneration tower, and avoid corrosion to the pipeline caused by the too low temperature of the resolved gas.
2) The on-way resistance in the secondary preheating process can also reduce the pressure value of the sealing nitrogen entering the tower, and avoid the influence on the structure of the regeneration tower caused by overlarge pressure of the incoming air.
3) The high-temperature medium flue gas and the sealing nitrogen are combined with the flue gas main pipe at the outlet of the adsorption tower after heat exchange, so that the discharge temperature of desulfurization and denitrification flue gas can be increased, the phenomenon of condensation caused by the excessively low temperature of the flue gas is avoided, and the long-period safe and stable operation of the system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that a person skilled in the art may obtain specific drawings from the drawings provided without inventive effort.
Fig. 1 is a schematic flow chart of the present invention.
FIG. 2 is a schematic plan view of a rotary regenerative heat exchanger according to the present invention.
FIG. 3 is a schematic flow diagram of a regeneration tower of a dry active coke desulfurization device in the prior art.
In the figure: 1. the device comprises a regeneration tower 2, a hot air circulating fan 3, a heat generator 4, a cooling fan plate heat exchanger 5, a sealed nitrogen pipeline 6, a plate heat exchanger 7, a rotary heat accumulating type heat exchanger 701, a flue gas zone 702, a transition zone 703, a nitrogen zone 704, a transition zone 8 and a flue gas surge tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As can be seen from fig. 1, the waste heat recovery system of the regeneration tower of the active coke dry method desulfurization device comprises a regeneration tower 1, a hot air circulating fan 2, a heat generator 3, a cooling fan 4 and a sealing nitrogen pipeline 5, wherein the cooling fan 4 is connected with the inlet of the cooling section of the regeneration tower 1, one end of the hot air circulating fan 2 is connected with the outlet pipeline of the preheating section of the regeneration tower 1, the other end of the hot air circulating fan 2 is connected with the heat generator 3, and the heat generator 3 is connected with the analysis section of the regeneration tower 1; the waste heat recovery system is characterized in that a plate heat exchanger 6 and a rotary heat accumulating type heat exchanger 7 are arranged; the sealed nitrogen pipeline 5 is sequentially connected with the plate heat exchanger 6, the rotary heat accumulating type heat exchanger 7 and the feed inlet of the regeneration tower 1; the plate heat exchanger 6 is connected with an outlet pipeline of the cooling section of the regeneration tower 1 to perform primary preheating of sealed nitrogen; the rotary heat accumulating type heat exchanger 7 is connected with an exhaust gas outlet pipeline outside the preheating section of the regeneration tower 1 to carry out secondary preheating of sealed nitrogen.
The plate heat exchanger 6 adopts a parallel structure, the working pressure is higher than the nitrogen gas pressure, and the heat transfer plate adopts a horizontal flat corrugated plate.
The medium in the plate heat exchanger 6 is air (100 ℃) at the outlet of the cooling section of the regeneration tower 1, and the cold medium is nitrogen at normal temperature.
As can be seen from fig. 1, a flue gas pressure stabilizing box 8 is arranged between the flue gas outlet outside the heating section of the regeneration tower 1 and the rotary heat accumulating type heat exchanger 7.
As can be seen from fig. 2, the rotary regenerative heat exchanger 7 is divided into a flue gas zone 701, a transition zone 702, a nitrogen zone 703 and a transition zone 704 along the rotor direction, and the ratio of the four zones to the rotor section is: 1/2, 1/12, 1/3, and 1/12, the flue gas flow cross-sectional area is larger than the nitrogen flow cross-sectional area because the flue gas volume flow is larger than the nitrogen.
The transition areas 702 and 704 of the rotary heat accumulating type heat exchanger 7 are isolated in a nitrogen sealing mode, and the flue gas and the nitrogen are isolated and are not mutually mixed.
The rotary heat accumulating heat exchanger 7 also comprises a rotor heat accumulator which is a corrugated plate pressed by a steel plate with the thickness of 0.5-1 mm, and a spacing positioning plate is arranged between the corrugated plates in a spaced arrangement mode.
The invention provides a method for recovering waste heat of a regeneration tower of an active coke dry desulfurization device, which is characterized in that normal-temperature sealing nitrogen is subjected to primary preheating with gas at the outlet (about 100 ℃) of a cooling section of the regeneration tower 1 through a plate heat exchanger 6, then subjected to secondary preheating with flue gas discharged from the heating section (about 330 ℃) of the regeneration tower 1 through a rotary heat accumulating type heat exchanger 7, and the sealing nitrogen is heated and then sent to the preheating section of the regeneration tower 1, thereby realizing the step recovery of the waste heat of the regeneration tower, and the specific steps are as follows:
1) The cooling fan 4 blows cooling air to the cooling section of the regeneration tower 1, the temperature of air at the outlet (node A) of the cooling section can reach more than 90-100 ℃, and the heated air enters the plate heat exchanger 6 to be preheated with sealing nitrogen for one time, and the heat exchange mode is a convection heat exchange and heat conduction mode; the heat medium air is directly exhausted after heat exchange;
2) The heated sealing nitrogen can reach 40-50 ℃, the sealing nitrogen which is heated at the first stage directly flows to the rotary heat accumulating type heat exchanger 7 from the outlet (node D) of the plate heat exchanger 6 through a pipeline, the heat source of the rotary heat accumulating type heat exchanger 7 is from the exhaust smoke (node B) of the thermal circulating air system, after the exhaust smoke obtains the heat of high-temperature smoke (330 ℃) through the smoke pressure stabilizing box 8 and the heat accumulating plate of the rotary heat accumulating type heat exchanger 7, the heat accumulating carrier of the smoke area is transferred to the nitrogen area through the rotor, the sealing nitrogen flowing in from the outlet (node D) of the plate heat exchanger 6 flows through the heated heat accumulating carrier, so that the aim of secondary preheating is fulfilled, and the sealing nitrogen at the outlet (node E) of the nitrogen area of the rotary heat accumulating type heat exchanger 7 is finally conveyed to the feed inlet of the regeneration tower 1;
3) The flue gas discharged from the outside is converged with the flue gas main pipe at the outlet of the adsorption tower through the outlet (node C) of the flue gas zone of the rotary heat accumulating type heat exchanger 7 and discharged from the chimney, so that the temperature of the flue gas discharged from the outside can be increased, and the phenomenon of dew formation caused by the too low temperature of the flue gas discharged from the outside is avoided.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.
Claims (8)
1. A waste heat recovery system of a regeneration tower of an active coke dry desulfurization device comprises a regeneration tower (1), a hot air circulating fan (2), a heat generator (3), a cooling fan (4) and a sealing nitrogen pipeline (5), wherein the cooling fan (4) is connected with an inlet of a cooling section of the regeneration tower (1), one end of the hot air circulating fan (2) is connected with an outlet pipeline of a preheating section of the regeneration tower (1), the other end of the hot air circulating fan is connected with the heat generator (3), and the heat generator (3) is connected with an analysis section of the regeneration tower (1); the waste heat recovery system is characterized in that the waste heat recovery system is provided with a plate heat exchanger (6) and a rotary heat accumulating type heat exchanger (7); the sealed nitrogen pipeline (5) is sequentially connected with the plate heat exchanger (6), the rotary heat accumulating type heat exchanger (7) and the feed inlet of the regeneration tower (1); the plate heat exchanger (6) is connected with an outlet pipeline of a cooling section of the regeneration tower (1) to perform primary preheating of sealed nitrogen; the rotary heat accumulating type heat exchanger (7) is connected with an exhaust gas outlet pipeline outside the preheating section of the regeneration tower (1) to perform secondary preheating of sealed nitrogen.
2. The active coke dry desulfurization device regeneration tower waste heat recovery system according to claim 1, wherein: the plate heat exchanger (6) adopts a parallel structure, the working pressure is higher than the nitrogen gas pressure, and the heat transfer plate adopts a horizontal flat corrugated plate.
3. The active coke dry desulfurization device regeneration tower waste heat recovery system according to claim 1, wherein: the medium in the plate heat exchanger (6) is air at the outlet of the cooling section of the regeneration tower (1), and the cold medium is nitrogen at normal temperature.
4. The active coke dry desulfurization device regeneration tower waste heat recovery system according to claim 1, wherein: a flue gas pressure stabilizing box (8) is arranged between the flue gas outlet outside the preheating section of the regeneration tower (1) and the rotary heat accumulating type heat exchanger (7).
5. The active coke dry desulfurization device regeneration tower waste heat recovery system according to claim 1, wherein: the rotary heat accumulating type heat exchanger (7) is divided into a smoke zone (701), a first transition zone (702), a nitrogen zone (703) and a second transition zone (704) along the rotor steering direction, and the proportions of the four zones to the section of the rotor are as follows: 1/2, 1/12, 1/3, 1/12.
6. The active coke dry desulfurization apparatus regeneration tower waste heat recovery system according to any one of claims 1 and 5, wherein: the first transition zone (702) and the second transition zone (704) of the rotary heat accumulating type heat exchanger (7) are isolated in a nitrogen sealing mode, and smoke and nitrogen are isolated, so that the smoke and the nitrogen are not mixed with each other.
7. The active coke dry desulfurization apparatus regeneration tower waste heat recovery system according to any one of claims 1 and 5, wherein: the rotary heat accumulating type heat exchanger (7) further comprises a rotor heat accumulator, wherein the rotor heat accumulator is a corrugated plate which is formed by pressing a steel plate with the thickness of 0.5-1 mm, and positioning plates are arranged between the corrugated plates in an alternate mode.
8. A method for recovering waste heat of a regeneration tower of an active coke dry desulfurization device is characterized by comprising the following steps of: the normal temperature sealing nitrogen carries out primary preheating with the outlet gas of the cooling section of the regeneration tower (1) through the plate heat exchanger (6), and then carries out secondary preheating with the exhaust gas outside the preheating section of the regeneration tower (1) through the rotary heat accumulating heat exchanger (7), and the sealing nitrogen is sent to the preheating section of the regeneration tower (1) after being heated, thereby realizing the step recovery of the waste heat of the regeneration tower, and the specific steps are as follows:
1) The cooling fan (4) blows cooling air to a cooling section of the regeneration tower (1), the temperature of air at an outlet of the cooling section can reach more than 90-100 ℃, and the heated air enters the plate heat exchanger (6) to be preheated with sealing nitrogen for one time, and the heat exchange mode is a convection heat exchange and heat conduction mode; the heat medium air is directly exhausted after heat exchange;
2) The heated sealing nitrogen can reach 40-50 ℃, the sealing nitrogen subjected to primary heating directly flows to the rotary heat accumulating type heat exchanger (7) from the outlet of the plate heat exchanger (6) through a pipeline, the heat source of the rotary heat accumulating type heat exchanger (7) is from the flue gas exhausted from the heat circulating air system, after the heat of the high-temperature flue gas is obtained by the flue gas pressure stabilizing box (8) and the heat accumulating plate of the rotary heat accumulating type heat exchanger (7), the heat accumulating carrier of the flue gas area is transferred to the nitrogen area through the rotor, the sealing nitrogen flowing in from the outlet of the plate heat exchanger (6) flows through the heated heat accumulating carrier, so that the aim of secondary preheating is fulfilled, and the sealing nitrogen flowing out of the nitrogen area of the rotary heat accumulating type heat exchanger (7) is finally conveyed to the feed inlet of the regeneration tower (1);
3) The flue gas discharged from the outside is converged with the flue gas main pipe at the outlet of the flue gas zone of the rotary heat accumulating type heat exchanger (7) and is discharged from the chimney, so that the temperature of the flue gas discharged from the outside can be increased, and the phenomenon of dew formation caused by the too low temperature of the flue gas discharged from the outside is avoided.
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| CN201710101898.5A CN106621809B (en) | 2017-02-24 | 2017-02-24 | System and method for recovering waste heat of regeneration tower of active coke dry desulfurization device |
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| CN108393066A (en) * | 2018-01-25 | 2018-08-14 | 华北电力大学 | Activated coke absorption regeneration integrated rotary formula device |
| CN108927111A (en) * | 2018-08-08 | 2018-12-04 | 国家能源投资集团有限责任公司 | The device for making of powdered activated coke and the reparation technology of powdered activated coke |
| CN108786372B (en) * | 2018-08-08 | 2024-04-12 | 国家能源投资集团有限责任公司 | Powder desulfurization active coke's analytical equipment |
| CN108940243B (en) * | 2018-08-08 | 2021-05-14 | 国家能源投资集团有限责任公司 | Active coke analysis device |
| CN109351119B (en) * | 2018-11-07 | 2023-12-22 | 中冶北方（大连）工程技术有限公司 | Automatic control system and method for matching of regenerated gas of active coke and atmoseal nitrogen |
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| CN105617900A (en) * | 2014-11-27 | 2016-06-01 | 中冶长天国际工程有限责任公司 | Ammonia gas and air mixing apparatus used for active carbon adsorption tower |
| CN204911154U (en) * | 2015-09-06 | 2015-12-30 | 天津奥展兴达化工技术有限公司 | Solid absorbent regeneration clarification plant |
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| CN106178819A (en) * | 2016-08-22 | 2016-12-07 | 朱双跃 | Activated coke desulfurization denitration by-product reforming unit and system for desulfuration and denitration and method |
| CN206474019U (en) * | 2017-02-24 | 2017-09-08 | 中冶华天南京工程技术有限公司 | A kind of active coke dry-method desulfuration device regenerator residual neat recovering system |
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