CN116510483A - Active coke turbulent bed desulfurization, denitrification and analysis device and desulfurization and denitrification process - Google Patents

Active coke turbulent bed desulfurization, denitrification and analysis device and desulfurization and denitrification process Download PDF

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Publication number
CN116510483A
CN116510483A CN202310618625.3A CN202310618625A CN116510483A CN 116510483 A CN116510483 A CN 116510483A CN 202310618625 A CN202310618625 A CN 202310618625A CN 116510483 A CN116510483 A CN 116510483A
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desulfurization
turbulent
active coke
denitrification
active
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Inventor
朱振坤
马春元
李伟明
曹荣莉
张广海
宋德升
张鑫
潘峰
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Shandong Xianghuan Environmental Technology Co ltd
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Shandong Xianghuan Environmental Technology Co ltd
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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
    • B01D53/75—Multi-step processes
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/06—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B01D53/10—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
    • B01D53/12—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents according to the "fluidised technique"
    • 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
    • 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B01D53/565—Nitrogen oxides by treating the gases with solids
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • 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
    • B01D53/83—Solid phase processes with moving reactants
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • 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
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention belongs to the technical field of environmental protection, relates to desulfurization and denitrification treatment of flue gas, and in particular relates to a device for desulfurization and denitrification and analysis of an active coke turbulent bed and a desulfurization and denitrification process, comprising the following steps: the turbulent bed adsorption tower is characterized in that a desulfurization unit and a denitration unit are sequentially arranged from bottom to top, the desulfurization unit is provided with at least two layers of desulfurization turbulent beds, the denitration unit is provided with at least one layer of denitration turbulent beds, the lower part of the denitration unit is provided with an ammonia spraying port, a flue gas inlet is arranged below the desulfurization unit, a flue gas outlet is arranged at the top of the turbulent bed adsorption tower, an active coke inlet is arranged above the denitration unit, an active coke outlet is arranged at the bottom of the turbulent bed adsorption tower, and the desulfurization turbulent beds and the denitration turbulent beds are of a sieve plate structure; and the analysis equipment is arranged below the turbulent bed adsorption tower and is used for heating and analyzing the adsorption active coke discharged from the active coke outlet of the turbulent bed adsorption tower, and the analyzed active coke is conveyed to the turbulent bed adsorption tower.

Description

Active coke turbulent bed desulfurization, denitrification and analysis device and desulfurization and denitrification process
Technical Field
The invention belongs to the technical field of environmental protection, relates to desulfurization and denitrification treatment of flue gas, and in particular relates to a device for desulfurization and denitrification as well as analysis of an active coke turbulent bed and a desulfurization and denitrification process.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
According to research and understanding of the inventor, the existing active coke flue gas purification technology generally adopts a moving bed adsorption and heating regeneration process, the process is complex, and active coke is burnt and worn in the operation process, so that the operation cost is high. The active coke consumption is mainly divided into two parts, namely physical consumption and chemical consumption, wherein the chemical consumption mainly refers to the part consumed in the process of taking part in chemical reaction in the desulfurization and denitrification process, and the chemical consumption is unavoidable; the physical consumption mainly refers to the loss caused by physical friction between active coke and active coke, extrusion, abrasion on a material circulation path and other factors in the material circulation process.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a device for desulfurizing, denitrating and analyzing an active coke turbulent bed and a desulfurization and denitration process, which can avoid burning and abrasion of active coke and reduce the running cost.
In order to achieve the above-mentioned object, it is required to reduce the temperature of desulfurization and denitrification, and it is found that reducing the temperature of desulfurization and denitrification reduces the removal efficiency of sulfur oxides and nitrogen oxides in the prior art, and in order to increase the removal efficiency of sulfur oxides and nitrogen oxides, the number or volume of the devices is generally increased, thereby increasing the occupation area and investment cost of the devices. Meanwhile, in order to realize recycling of the active coke, the absorbed active coke is required to be analyzed, however, the space of the site is limited, so that the problems that desulfurization and denitrification by an active coke method and analysis cannot be simultaneously implemented are caused. Further researches show that the existing active coke flue gas purification technology also has the problem that the active coke is not fully contacted with flue gas, so that the problem that the removal efficiency of sulfur oxides and nitrogen oxides is lower after the temperature is reduced is caused.
In order to solve the problems, the technical scheme of the invention is as follows:
in one aspect, an apparatus for desulfurization, denitrification and resolution of an active coke turbulent bed comprises:
the turbulent bed adsorption tower is characterized in that a desulfurization unit and a denitration unit are sequentially arranged from bottom to top, the desulfurization unit is provided with at least two layers of desulfurization turbulent beds, the denitration unit is provided with at least one layer of denitration turbulent beds, the lower part of the denitration unit is provided with an ammonia spraying port, a flue gas inlet is arranged below the desulfurization unit, a flue gas outlet is arranged at the top of the turbulent bed adsorption tower, an active coke inlet is arranged above the denitration unit, an active coke outlet is arranged at the bottom of the turbulent bed adsorption tower, and the desulfurization turbulent beds and the denitration turbulent beds are of a sieve plate structure;
and the analysis equipment is arranged below the turbulent bed adsorption tower and is used for heating and analyzing the adsorption active coke discharged from the active coke outlet of the turbulent bed adsorption tower, and the analyzed active coke is conveyed to the turbulent bed adsorption tower.
The flue gas inlet and outlet of the turbulent bed adsorption tower are arranged to enable flue gas to flow upwards in the turbulent bed adsorption tower from bottom to top, the active coke inlet and outlet of the turbulent bed adsorption tower is arranged to enable active coke to flow downwards in the turbulent bed adsorption tower from top to bottom, the active coke is in countercurrent contact with the flue gas, in the flue gas treatment process, the flue gas is firstly adsorbed by the active coke to remove sulfur oxides, and then nitrogen oxides are upwards reduced under the action of ammonia water and fresh active coke, so that the nitrogen oxides are removed; in the moving process of the active coke, the active coke not only can catalyze the reaction of the flue gas and ammonia gas after desulfurization, but also can further activate the active coke, then contacts the flue gas after descending, and can better adsorb the sulfur oxides in the flue gas. Meanwhile, the desulfurization turbulent bed and the denitration turbulent bed are both in a sieve plate structure, so that active coke is turbulent in the desulfurization turbulent bed and the denitration turbulent bed, the contact between the active coke and the flue gas is increased, and the problem of insufficient contact between the active coke and the flue gas is solved. Through the cooperation of the arrangement, the desulfurization and denitrification efficiency of the active coke under the medium-low temperature condition is increased, so that the increase of the number or the volume of the device is avoided, and the investment cost is further saved.
In addition, the invention installs the analysis equipment below the turbulent bed adsorption tower, solves the problem of overlarge occupied area, and solves the problem that the active coke desulfurization and denitrification can not be implemented simultaneously due to the limitation of the space of the field.
On the other hand, a desulfurization and denitrification process is provided, the active Jiao Tuandong bed desulfurization and denitrification and analysis device is provided, the flue gas is cooled to 80-150 ℃ and then is introduced into the device, and the flue gas entering the device is firstly subjected to adsorption desulfurization and then is subjected to reduction and denitrification with ammonia water; and after adsorption desulfurization, the activated coke generated after adsorption enters analysis equipment to be heated and analyzed, and the analyzed activated coke is added into the device again to carry out desulfurization and denitrification.
The beneficial effects of the invention are as follows:
1. compared with other active coke combined desulfurization and denitrification processes, the pollutant treatment device adopting turbulent bed adsorption and analytic regeneration has the advantages of small occupied space and low investment cost.
2. The invention adopts active coke as adsorbent to realize NO at 80-150 DEG C x Compared with the existing denitration technology, the reduction is not limited by a temperature window, and has greater applicability.
3. The invention realizes the combined removal of SO by the arrangement of the turbulent bed adsorption tower 2 Integration of NOx, SO 2 The removal rate can reach more than 98 percent, the NOx removal rate can exceed 80 percent, and the wet method can remove SO which is difficult to remove 3 ,SO 3 The removal rate of the catalyst is very high. And hydrocarbon, such as dioxin, heavy metals, such as mercury and other toxic substances in the exhaust gas can be removed, and the flue gas can be deeply treated.
In conclusion, the device is simple, organically integrated, convenient to maintain and use, suitable for the desulfurization and denitration process with the flue gas at the middle and low temperature of 80-150 ℃, has the advantage of small occupied area, and is stable in system operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic diagram of an apparatus for desulfurizing, denitrating and analyzing active coke in example 1 of the present invention;
FIG. 2 is a schematic diagram of an apparatus for desulfurizing, denitrating and analyzing activated coke according to example 2 of the present invention;
wherein, 1, a bag-type dust remover, 2, an ammonia water spray gun, 3, a denitration turbulent bed layer, 4, a desulfurization turbulent bed layer, 5, a blanking pipe, 6, an ash bucket, 7, a fluidization plate, 8, an ash bucket manual gate valve, 9, an electric gate valve, 10, an ash bucket star-shaped feeder, 11, a preheating analysis section, 12, a cooling section, 13, an electric flashboard door, 14, a pipe chain conveyor, 15, a pipe chain conveyor, 16, a buffer bin manual flashboard door, 17, an air pumping tank, 18, a buffer bin star-shaped feeder, 19, a jet pipe, 20 and a Roots blower.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In view of the low desulfurization and denitrification efficiency of the existing active coke desulfurization and denitrification under the condition of medium and low temperature (80-150 ℃), the invention provides a device for desulfurization and denitrification and analysis of an active coke turbulent bed and a desulfurization and denitrification process.
An exemplary embodiment of the present invention provides an apparatus for desulfurizing, denitrating and resolving an active coke turbulent bed, comprising:
the turbulent bed adsorption tower is characterized in that a desulfurization unit and a denitration unit are sequentially arranged from bottom to top, the desulfurization unit is provided with at least two layers of desulfurization turbulent beds, the denitration unit is provided with at least one layer of denitration turbulent beds, the lower part of the denitration unit is provided with an ammonia spraying port, a flue gas inlet is arranged below the desulfurization unit, a flue gas outlet is arranged at the top of the turbulent bed adsorption tower, an active coke inlet is arranged above the denitration unit, an active coke outlet is arranged at the bottom of the turbulent bed adsorption tower, and the desulfurization turbulent beds and the denitration turbulent beds are of a sieve plate structure;
and the analysis equipment is arranged below the turbulent bed adsorption tower and is used for heating and analyzing the adsorption active coke discharged from the active coke outlet of the turbulent bed adsorption tower, and the analyzed active coke is conveyed to the turbulent bed adsorption tower.
According to the turbulent bed adsorption tower, the active coke is in countercurrent contact with the flue gas through the arrangement of the flue gas inlet and the active coke inlet, so that the adsorption efficiency is improved, and the reaction efficiency is improved. Meanwhile, the desulfurization turbulent bed layer and the denitration turbulent bed layer are both of a sieve plate structure, so that the contact between active coke and smoke is increased, and the problem of insufficient contact between the active coke and the smoke is solved. Through the cooperation of the arrangement, the desulfurization and denitrification efficiency of the active coke under the medium-low temperature condition is increased, so that the increase of the number or the volume of the device is avoided, and the investment cost is further saved.
The invention installs the analysis equipment below the turbulent bed adsorption tower, solves the problem of overlarge occupied area, and solves the problem that the active coke desulfurization and denitrification can not be implemented simultaneously due to the limitation of the space of the field.
The resolving device may be a heat exchanger, such as a tube array heat exchanger or the like. In some examples of this embodiment, the analytical device is of a horizontal configuration. At this time, the heat exchange tube array is transversely arranged, so that the space in the vertical direction is saved.
In some examples of this embodiment, the analytical device comprises a pre-heating analytical section and a cold air section connected in sequence.
In some examples of this embodiment, a bag-type dust collector is disposed above the denitration unit. Avoiding the flue gas from carrying part of active coke.
In some examples of this embodiment, a blanking tube is disposed between the desulfurization turbulent beds. The height of the desulfurization turbulent bed layer is adjusted through the blanking pipe to adapt to the flue gas treatment of different sulfur oxide contents.
Some examples of the embodiment include an activated coke circulating and conveying device for conveying the activated coke resolved by the resolving device to a turbulent bed adsorption tower.
In one or more embodiments, the activated coke circulating conveying device comprises a pipe chain conveyor, a resolving buffer bin and a conveying device which are connected in sequence. And conveying the resolved active coke in the resolved buffer bin to a turbulent bed adsorption tower by conveying equipment through a pipe chain conveyor. The conveying equipment comprises a feeder, a jet pipe and a fan, wherein the feeder conveys the resolved active coke to the jet pipe, and the fan conveys the resolved active coke in the jet pipe to the turbulent bed adsorption tower.
In another embodiment of the invention, a desulfurization and denitrification process is provided, the device for desulfurization, denitrification and analysis of the active Jiao Tuandong bed is provided, the flue gas is cooled to 80-150 ℃ and then is introduced into the device, and the flue gas entering the device is firstly subjected to adsorption desulfurization and then is subjected to reduction and denitrification with ammonia water; and after adsorption desulfurization, the activated coke generated after adsorption enters analysis equipment to be heated and analyzed, and the analyzed activated coke is added into the device again to carry out desulfurization and denitrification.
In some examples of this embodiment, the temperature of the desorption is 400 to 600 ℃. The resolving effect is better at the temperature.
In some examples of this embodiment, the resolved heat source is flue gas. And the energy multi-level utilization is realized.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
Example 1
The device for desulfurizing, denitrating and resolving active coke comprises an adsorption system I, a reduction system II and a resolving system III, wherein the adsorption system I and the reduction system II are arranged in a turbulent bed adsorption tower as shown in figure 1. The adsorption system I comprises a bag-type dust collector 1, a desulfurization turbulent bed layer 4, a blanking pipe 5, an ash bucket 6, a fluidization plate 7, an ash bucket manual gate valve 8, an electric gate valve 9 and an ash bucket star-shaped feeder 10. The reduction system II comprises an ammonia water spray gun 2 and a denitration turbulent bed layer 3. The turbulent bed adsorption tower is internally provided with a bag dust collector 1, a denitration section, a desulfurization section and an ash bucket 6 from top to bottom in sequence, the denitration section is internally provided with a denitration turbulent bed 3, and an ammonia water spray gun 2 is arranged below the denitration turbulent bed 3. Two layers of desulfurization turbulent bed layers 4 are arranged in the desulfurization section, and the desulfurization turbulent bed layers 4 are arranged on the blanking pipe 5. A fluidization plate 7 is arranged in the ash bucket 6. The outlet of the ash bucket 6 (active coke outlet) is provided with an ash bucket manual gate valve 8, an electric gate valve 9 and an ash bucket star-shaped feeder 10 in sequence. The active coke inlet of the turbulent bed adsorption tower is positioned between the denitration section and the bag-type dust collector 1. The flue gas inlet is arranged between the ash bucket 6 and the desulfurization section. The flue gas outlet is arranged at the top of the turbulent bed adsorption tower.
The analysis system III is analysis equipment and has a horizontal structure and comprises a preheating analysis section 11 and a cooling section 12 which are sequentially connected. The active coke outlet of the analysis device is connected with the active coke inlet of the turbulent bed adsorption tower.
The working method comprises the following steps: the flue gas enters an air inlet chamber of the device and passes through two layers of desulfurization turbulent bed layers 4 from bottom to top to react with active coke on the desulfurization turbulent bed layers 4 to remove SO 2 Then enters into the upper denitration turbulent bed layer 3, is mixed with ammonia gas sprayed by a reducing agent system II, and continuously reacts with active coke on the denitration turbulent bed layer 3 to remove NO within the range of 80-150 DEG C x The purified flue gas enters the bag-type dust collector 1 and is discharged. The active coke moves from top to bottom in the turbulent bed adsorption tower, the back blowing ash of the bag-type dust collector 1 drifts down to the denitration turbulent bed layer 3, the denitration turbulent bed layer 3 is of a sieve plate structure, the active coke powder can move down, the denitration turbulent bed layer 4 is of a sieve plate structure, and the blanking pipe 5 is of a structure according to SO 2 The content is optimally arranged, and the height of the running material level of the turbulent bed layer 4 is adjusted. After the active coke is piled up at a certain height in the ash bucket 6, the active coke is conveyed to the analysis system III through the ash bucket manual gate valve 8, the electric gate valve 9 and the ash bucket star-shaped feeder 10 under the fluidization of the fluidization plate 7.
The analysis system III consists of a preheating analysis section 11 and a cooling section 12. The resolved flue gas at 400-600 ℃ enters a tube pass of a preheating resolving section 11, active coke is removed from a shell pass, and the active coke is pyrolyzed at high temperature to obtain high-purity SO 2 Gas entry SO 2 In the deep processing device, active coke flows into the cooling section 12 under the blowing of nitrogen, the active coke passes through the shell side of the cooling section 12, and the cooling air passes through the tube side. And cooling the active coke and then conveying the cooled active coke to a turbulent bed adsorption tower.
Example 2
The device for desulfurizing, denitrating and resolving the active coke comprises an adsorption system I, a reduction system II, a resolving system III and an active coke circulating system IV as shown in figure 2; the adsorption system I comprises a bag dust collector 1, a desulfurization turbulent bed layer 4, a blanking pipe 5, an ash bucket 6, a fluidization plate 7, an ash bucket manual gate valve 8, an electric gate valve 9 and an ash bucket star-shaped feeder 10, the reduction system II comprises an ammonia water spray gun 2 and a denitration turbulent bed layer 3, the analysis system III comprises a preheating analysis section 11, a cooling section 12 and an electric gate 13, and the active coke circulation system IV comprises a pipe chain conveyor 14, an analysis buffer bin 15, a buffer bin manual gate 16, an air suction tank 17, a buffer bin star-shaped feeder 18, a spray pipe 19 and a Roots blower 20.
The adsorption system I and the reduction system II are turbulent bed adsorption towers, the uppermost layer is a denitration section, and the lower two layers are desulfurization sections. The bag-type dust collector 1 and the tower are integrated (may be placed additionally).
The working method of the active coke desulfurization, denitrification and analysis device comprises the steps that flue gas enters an air inlet chamber of the device, passes through two layers of desulfurization turbulent bed layers 4 from bottom to top, and reacts with active coke on the desulfurization turbulent bed layers 4 to remove SO (sulfur oxide) 2 Then enters the upper denitration turbulent bed layer 3, is mixed with ammonia gas sprayed by the reducing agent system II, and continuously reacts with active coke on the denitration turbulent bed layer 3 to remove NO within the range of 80-150 DEG C x The purified flue gas enters a bag-type dust remover 1 and is discharged; the active coke moves from top to bottom in the turbulent bed adsorption tower, the back blowing ash of the bag-type dust collector 1 drifts down to the denitration turbulent bed 3, the bottom of the denitration turbulent bed 3 is of a sieve plate structure, the active coke powder can move down, the bottom of the desulfurization turbulent bed 4 is of a sieve plate structure, and the blanking pipe 5 is in accordance with SO 2 The content is adjusted by adjusting the gas quantity and the gas flow speed of the treated flue gas, so that the operation material level height of the desulfurization turbulent bed layer 4 is adjusted. After the active coke is piled up at a certain height in the ash bucket 6, the active coke is conveyed to the analysis system III through the ash bucket manual gate valve 8, the electric gate valve 9 and the ash bucket star-shaped feeder 10 under the fluidization of the fluidization plate 7.
The analysis system III consists of a preheating analysis section 11 and a cooling section 12. The resolved flue gas at 400-600 ℃ enters a tube pass of a preheating resolving section 11, active coke is removed from a shell pass, and the active coke is pyrolyzed at high temperature to obtain high-purity SO 2 Gas entry SO 2 In the deep processing device, active coke flows into the cooling section 12 under the blowing of nitrogen, the active coke passes through the shell side of the cooling section 12, and the cooling air passes through the tube side. And the cooled active coke enters an active coke circulation system IV through an electric gate valve 13.
The resolved active coke enters the resolving buffer bin 15 through the pipe chain conveyor 14, then enters the injection pipe 19 through the manual flashboard door 16 of the buffer bin, the air extraction tank 17 and the star-shaped feeder 18 of the buffer bin, and is conveyed to the adsorption tower under the action of the Roots blower 20, so that the purpose of recycling the active coke is achieved.
Flue gas desulfurization and denitration, SO, were performed using this example 2 The removal rate can reach more than 98 percent, NO x The removal rate can exceed 80 percent, and can remove SO which is difficult to remove by wet method 3 。
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An active coke turbulent bed desulfurization, denitrification and analysis device is characterized by comprising:
the turbulent bed adsorption tower is characterized in that a desulfurization unit and a denitration unit are sequentially arranged from bottom to top, the desulfurization unit is provided with at least two layers of desulfurization turbulent beds, the denitration unit is provided with at least one layer of denitration turbulent beds, the lower part of the denitration unit is provided with an ammonia spraying port, a flue gas inlet is arranged below the desulfurization unit, a flue gas outlet is arranged at the top of the turbulent bed adsorption tower, an active coke inlet is arranged above the denitration unit, an active coke outlet is arranged at the bottom of the turbulent bed adsorption tower, and the desulfurization turbulent beds and the denitration turbulent beds are of a sieve plate structure;
and the analysis equipment is arranged below the turbulent bed adsorption tower and is used for heating and analyzing the adsorption active coke discharged from the active coke outlet of the turbulent bed adsorption tower, and the analyzed active coke is conveyed to the turbulent bed adsorption tower.
2. The apparatus for desulfurization, denitrification and resolution of an active Jiao Tuandong bed according to claim 1, wherein the resolution device is of a horizontal configuration.
3. The apparatus for desulfurization, denitrification and resolution of an active Jiao Tuandong bed according to claim 1, wherein the resolution means comprises a preheating resolution section and a cold air section connected in sequence.
4. The device for desulfurizing, denitrating and resolving an active Jiao Tuandong bed as claimed in claim 1, wherein a bag-type dust remover is arranged above the denitration unit.
5. The apparatus for desulfurization, denitrification and resolution of an active Jiao Tuandong bed as claimed in claim 1, wherein a blanking tube is disposed between the turbulent desulfurization beds.
6. The apparatus for desulfurization, denitrification and resolution of an active Jiao Tuandong bed according to claim 1, comprising an active coke circulating and conveying device for conveying the active coke resolved by the resolving device to a turbulent bed adsorption tower.
7. The device for desulfurizing, denitrating and resolving the active Jiao Tuandong bed as claimed in claim 6, wherein the active coke circulating conveying equipment comprises a pipe chain conveyor, a resolving buffer bin and conveying equipment which are connected in sequence.
8. The desulfurization and denitrification process is characterized in that an active Jiao Tuandong bed desulfurization and denitrification and analysis device according to any one of claims 1-7 is provided, the flue gas is cooled to 80-150 ℃ and then is introduced into the device, and the flue gas entering the device is subjected to adsorption desulfurization firstly and then is subjected to reduction and denitrification with ammonia water; and after adsorption desulfurization, the activated coke generated after adsorption enters analysis equipment to be heated and analyzed, and the analyzed activated coke is added into the device again to carry out desulfurization and denitrification.
9. The desulfurization and denitrification process according to claim 8, wherein the temperature of the desorption is 400-600 ℃.
10. The desulfurization and denitrification process of claim 8, wherein the resolved heat source is flue gas.
CN202310618625.3A 2023-05-26 2023-05-26 Active coke turbulent bed desulfurization, denitrification and analysis device and desulfurization and denitrification process Pending CN116510483A (en)

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