CN107081037A - A kind of fume environment protection sulfur removal technology - Google Patents

A kind of fume environment protection sulfur removal technology Download PDF

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Publication number
CN107081037A
CN107081037A CN201710537074.2A CN201710537074A CN107081037A CN 107081037 A CN107081037 A CN 107081037A CN 201710537074 A CN201710537074 A CN 201710537074A CN 107081037 A CN107081037 A CN 107081037A
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sulfur
reactor
fine
thick
flue gas
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杨自芬
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Hefei Zhuo Zhuo Electric Power Co Ltd
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Hefei Zhuo Zhuo Electric Power 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
    • B01D53/02—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • 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
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • 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
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/106—Peroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/80—Organic bases or salts
    • 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
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • B01D2253/1124—Metal oxides
    • 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
    • B01D2253/116—Molecular sieves other than zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • 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
    • 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
    • B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
    • 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
    • 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
    • B01D2259/403—Further details for adsorption processes and devices using three beds
    • 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
    • B01D2259/414—Further details for adsorption processes and devices using different types of adsorbents

Abstract

The invention discloses a kind of fume environment protection sulfur removal technology, the sulfur removal technology comprises the following steps：（1）The dedusting and washing of flue gas：Flue gas is set to remove part dust by dust-removing flue；Cleaning solution washing is passed through, cleaning solution includes the raw material of following parts by weight：40~50 parts of hydrogen peroxide, 5~10 parts of sodium hydrate particle, 1~5 part of empgen BB, 1~3 part of sodium carboxymethylcellulose；（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent；（3）One-level fine de-sulfur：One-level fine de-sulfur is carried out using normal temperature activated carbon desulphurization agent；（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfurs are carried out using molecular sieve desulfurizer.The a variety of organic sulfur absorbents of sulfur removal technology of the present invention are renewable to be recycled, and is eliminated interference of the inorganic sulphur impurity to absorption and the removing of adsorbent, is improved the efficiency of desulfurization, energy-conserving and environment-protective subtract consumption, improves the purity and cleanliness factor of flue gas after desulfurization.

Description

A kind of fume environment protection sulfur removal technology
Technical field
The present invention relates to desulfurization processing technique field, and in particular to a kind of fume environment protection sulfur removal technology.
Background technology
In existing flue gas desulfurization technique, the sulfur dioxide in flue gas is absorbed using ammoniacal liquor mostly, and in desorption under high temperature mistake The ammoniacal liquor of sulfur dioxide absorption is desorbed in journey, the sulfur dioxide gas of higher degree is obtained, and makes ammoniacal liquor repetitive cycling Use.At present, also a kind of process of ionic liquid desulfurization, the technique generally includes first order absorption and one-level desorption, and In the case where dust content is big, using flue gas prewashing technique.In addition, in existing ionic liquid sulfur removal technology, using biography The resin desalinating process of system performs the recovery of desulfuration solution.Therefore, there is suspended impurity in desulfuration solution in existing sulfur removal technology Content height, system jams, a series of problems, such as desulfurization degree is low, equipment investment is higher.
The content of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art there is provided a kind of fume environment protection sulfur removal technology, pass through First dedusting washing, then thick desulfurization, one-level essence take off, two grades of essences take off, a variety of organic sulfur absorbents are renewable to be recycled, and is eliminated Interference of the inorganic sulphur impurity to absorption and the removing of adsorbent, improves the efficiency of desulfurization, and energy-conserving and environment-protective subtract consumption, improve desulfurization The purity and cleanliness factor of flue gas afterwards.
The present invention solves technical problem and adopted the following technical scheme that：
A kind of fume environment protection sulfur removal technology, comprises the following steps：
（1）The dedusting and washing of flue gas：Flue gas is set to remove part dust by dust-removing flue；It is passed through cleaning solution so that cleaning solution Washing is contacted in void tower with flue gas, the cleaning solution includes the raw material of following parts by weight：40~50 parts of hydrogen peroxide, sodium hydroxide 5~10 parts of particle, 1~5 part of empgen BB, 1~3 part of sodium carboxymethylcellulose；
（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent, when sulphur in thick depriving hydrogen sulphide reactor effluent Change the μ g.g of hydrogen sulfur content >=15-1When be switched to standby reactor, former reactor is heated to 60~80 DEG C, gravity-flow ventilation makes often Warm ferric oxide desulfurizer regeneration；
（3）One-level fine de-sulfur：One-level fine de-sulfur reactor is passed through by the flue gas of thick depriving hydrogen sulphide, normal temperature active carbon desulfurization is used Agent carries out one-level fine de-sulfur, as the μ g.g of hydrogen sulfide sulfur content in thick depriving hydrogen sulphide reactor effluent >=0.3-1When be switched to it is standby Reactor, is heated to 50~60 DEG C, gravity-flow ventilation regenerates normal temperature activated carbon desulphurization agent by former reactor；
（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfur reactors are passed through by the flue gas of one-level fine de-sulfur, are entered using molecular sieve desulfurizer Two grades of fine de-sulfurs of row, as the μ g.g of hydrogen sulfide sulfur content in one-level fine de-sulfur reactor effluent >=0.1-1When be switched to standby reaction Device, 120~150 DEG C of nitrogen helium mixture is passed through into former reactor, molecular sieve desulfurizer is regenerated.
Preferably, the cleaning solution includes the raw material of following parts by weight：46 parts of hydrogen peroxide, 8 parts of sodium hydrate particle, 12 3 parts of alkyl betaine, 2 parts of sodium carboxymethylcellulose.
Preferably, the step（1）Need to remove most of sludge and bulky grain by gravity settling chamber before flue gas ash removal Impurity.
Preferably, the operation temperature of the thick depriving hydrogen sulphide reactor is 40~50 DEG C, and operating pressure is 1~3MPa, empty Speed is 500~800h-1。
Preferably, the operation temperature of the one-level fine de-sulfur reactor is 50~60 DEG C, and operating pressure is 3~5MPa, empty Speed is 900~1200h-1。
Preferably, the operation temperature of two grades of fine de-sulfur reactors is 60~80 DEG C, and operating pressure is 5~8MPa, empty Speed is 1200~1500h-1。
Preferably, the thick depriving hydrogen sulphide reactor, one-level fine de-sulfur reactor, two grades of fine de-sulfur reactors are kept wherein One unlatching, two other state closed.
Preferably, the content of nitrogen is 60~70% in the nitrogen helium mixture, and the content of helium is 30~40%.
Compared with prior art, the present invention has following beneficial effect：
（1）The flue gas desulfurization technique of the present invention, is washed by first dedusting, then thick depriving hydrogen sulphide, one-level fine de-sulfur, two grades of fine de-sulfurs Technological process, a variety of organic sulfur absorbents are renewable to be recycled, eliminate inorganic sulphur impurity to the absorption of adsorbent and The interference of removing, improves the efficiency of desulfurization, and energy-conserving and environment-protective subtract consumption, improves the purity and cleanliness factor of flue gas after desulfurization.
（2）The cleaning solution of the present invention, comprising the stronger hydrogen peroxide of oxidisability, can adsorb most of acid particles impurity Sodium hydroxide, the zwitterionic surfactant empgen BB with excellent compatibility and ph stability, and tool There is the cigarette to being produced in power generation after excellent sedimentation, the sodium carboxymethylcellulose of flocculation, each composition safety non-toxic, compatibility Most of dust, granule foreign in gas have good adsorption and sedimentation effect.
（3）Sulphur of the normal temperature iron oxide desulfurizing agent, activated carbon desulphurization agent, molecular sieve desulfurizer of the present invention in absorption flue gas Change after the sulfurous gas impurity such as hydrogen, the regeneration period of desulfurizing agent can be substantially reduced with circular regeneration, simple regeneration technology, Desulphurization cost is saved.
（4）The present invention thick depriving hydrogen sulphide, one-level fine de-sulfur, two grades of fine de-sulfurs respectively by operation temperature, work press The regulation and control of the technological parameters such as power, air speed, constantly reduce the impurity content in flue gas, improve containing for the principal components such as nitrogen, oxygen Amount and purity so that flue gas reaches the standard conditions for recycling or discharging.
（5）The regeneration of the molecular sieve of the present invention, is passed through the nitrogen helium mixture of high temperature, and nitrogen and helium are the lazy of stabilization Property gas, can efficiently blow down the moisture impurity in molecular sieve, shorten the regeneration period.
Embodiment
Invention is described in further detail below in conjunction with specific embodiment.
Embodiment 1
A kind of fume environment protection sulfur removal technology, comprises the following steps：
（1）The dedusting and washing of flue gas：Flue gas is passed through gravity settling chamber and removes most of sludge and large granular impurity, then by removing Cloud of dust road removes part dust；It is passed through cleaning solution so that cleaning solution contacts washing with flue gas in void tower, the cleaning solution includes The raw material of following parts by weight：46 parts of hydrogen peroxide, 8 parts of sodium hydrate particle, 3 parts of empgen BB, sodium carboxymethylcellulose 2 Part.
（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent, when thick depriving hydrogen sulphide reactor effluent The μ g.g of middle hydrogen sulfide sulfur content >=15-1When be switched to standby reactor, former reactor is heated to 65 DEG C, gravity-flow ventilation makes often Warm ferric oxide desulfurizer regeneration；The operation temperature of thick depriving hydrogen sulphide reactor is 46 DEG C, and operating pressure is 1.6MPa, and air speed is 750h-1。
（3）One-level fine de-sulfur：One-level fine de-sulfur reactor is passed through by the flue gas of thick depriving hydrogen sulphide, normal temperature activated carbon is used Desulfurizing agent carries out one-level fine de-sulfur, as the μ g.g of hydrogen sulfide sulfur content in thick depriving hydrogen sulphide reactor effluent >=0.3-1When be switched to Standby reactor, is heated to 56 DEG C, gravity-flow ventilation regenerates normal temperature activated carbon desulphurization agent by former reactor；One-level fine de-sulfur is anti- The operation temperature for answering device is 55 DEG C, and operating pressure is 3.8MPa, and air speed is 1000h-1。
（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfur reactors are passed through by the flue gas of one-level fine de-sulfur, molecular sieve sweetneing is used Agent carries out two grades of fine de-sulfurs, as the μ g.g of hydrogen sulfide sulfur content in one-level fine de-sulfur reactor effluent >=0.1-1When be switched to it is standby Reactor, 145 DEG C of nitrogen helium mixture is passed through into former reactor, molecular sieve desulfurizer is regenerated.In nitrogen helium mixture The content of nitrogen is 65%, and the content of helium is 35%.The operation temperature of two grades of fine de-sulfur reactors is 72 DEG C, and operating pressure is 7.8MPa, air speed is 1400h-1.Thick depriving hydrogen sulphide reactor, one-level fine de-sulfur reactor, two grades of fine de-sulfur reactors keep it In one unlatching, two other close state.
The desulfuration efficiency of the present embodiment is 95%.
Embodiment 2
A kind of fume environment protection sulfur removal technology, comprises the following steps：
（1）The dedusting and washing of flue gas：Flue gas is passed through gravity settling chamber and removes most of sludge and large granular impurity, then by removing Cloud of dust road removes part dust；It is passed through cleaning solution so that cleaning solution contacts washing with flue gas in void tower, the cleaning solution includes The raw material of following parts by weight：40 parts of hydrogen peroxide, 6 parts of sodium hydrate particle, 2 parts of empgen BB, sodium carboxymethylcellulose 1 Part.
（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent, when thick depriving hydrogen sulphide reactor effluent The μ g.g of middle hydrogen sulfide sulfur content >=15-1When be switched to standby reactor, former reactor is heated to 65 DEG C, gravity-flow ventilation makes often Warm ferric oxide desulfurizer regeneration；The operation temperature of thick depriving hydrogen sulphide reactor is 48 DEG C, and operating pressure is 2.2MPa, and air speed is 700h-1。
（3）One-level fine de-sulfur：One-level fine de-sulfur reactor is passed through by the flue gas of thick depriving hydrogen sulphide, normal temperature activated carbon is used Desulfurizing agent carries out one-level fine de-sulfur, as the μ g.g of hydrogen sulfide sulfur content in thick depriving hydrogen sulphide reactor effluent >=0.3-1When be switched to Standby reactor, is heated to 60 DEG C, gravity-flow ventilation regenerates normal temperature activated carbon desulphurization agent by former reactor；One-level fine de-sulfur is anti- The operation temperature for answering device is 60 DEG C, and operating pressure is 4.3MPa, and air speed is 1100h-1。
（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfur reactors are passed through by the flue gas of one-level fine de-sulfur, molecular sieve sweetneing is used Agent carries out two grades of fine de-sulfurs, as the μ g.g of hydrogen sulfide sulfur content in one-level fine de-sulfur reactor effluent >=0.1-1When be switched to it is standby Reactor, 140 DEG C of nitrogen helium mixture is passed through into former reactor, molecular sieve desulfurizer is regenerated.In nitrogen helium mixture The content of nitrogen is 68%, and the content of helium is 32%.The operation temperature of two grades of fine de-sulfur reactors is 77 DEG C, and operating pressure is 6.8MPa, air speed is 1350h-1.Thick depriving hydrogen sulphide reactor, one-level fine de-sulfur reactor, two grades of fine de-sulfur reactors keep it In one unlatching, two other close state.
The desulfuration efficiency of the present embodiment is 93%.
Embodiment 3
A kind of fume environment protection sulfur removal technology, comprises the following steps：
（1）The dedusting and washing of flue gas：Flue gas is passed through gravity settling chamber and removes most of sludge and large granular impurity, then by removing Cloud of dust road removes part dust；It is passed through cleaning solution so that cleaning solution contacts washing with flue gas in void tower, the cleaning solution includes The raw material of following parts by weight：50 parts of hydrogen peroxide, 10 parts of sodium hydrate particle, 5 parts of empgen BB, sodium carboxymethylcellulose 2 parts.
（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent, when thick depriving hydrogen sulphide reactor effluent The μ g.g of middle hydrogen sulfide sulfur content >=15-1When be switched to standby reactor, former reactor is heated to 76 DEG C, gravity-flow ventilation makes often Warm ferric oxide desulfurizer regeneration；The operation temperature of thick depriving hydrogen sulphide reactor is 45 DEG C, and operating pressure is 2.8MPa, and air speed is 800h-1。
（3）One-level fine de-sulfur：One-level fine de-sulfur reactor is passed through by the flue gas of thick depriving hydrogen sulphide, normal temperature activated carbon is used Desulfurizing agent carries out one-level fine de-sulfur, as the μ g.g of hydrogen sulfide sulfur content in thick depriving hydrogen sulphide reactor effluent >=0.3-1When be switched to Standby reactor, is heated to 59 DEG C, gravity-flow ventilation regenerates normal temperature activated carbon desulphurization agent by former reactor；One-level fine de-sulfur is anti- The operation temperature for answering device is 60 DEG C, and operating pressure is 4.6MPa, and air speed is 1100h-1。
（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfur reactors are passed through by the flue gas of one-level fine de-sulfur, molecular sieve sweetneing is used Agent carries out two grades of fine de-sulfurs, as the μ g.g of hydrogen sulfide sulfur content in one-level fine de-sulfur reactor effluent >=0.1-1When be switched to it is standby Reactor, 146 DEG C of nitrogen helium mixture is passed through into former reactor, molecular sieve desulfurizer is regenerated.In nitrogen helium mixture The content of nitrogen is 62%, and the content of helium is 38%.The operation temperature of two grades of fine de-sulfur reactors is 80 DEG C, and operating pressure is 8MPa, air speed is 1380h-1.Thick depriving hydrogen sulphide reactor, one-level fine de-sulfur reactor, two grades of fine de-sulfur reactors are kept wherein One unlatching, two other state closed.
The desulfuration efficiency of the present embodiment is 92%.
Embodiment 4
A kind of fume environment protection sulfur removal technology, comprises the following steps：
（1）The dedusting and washing of flue gas：Flue gas is passed through gravity settling chamber and removes most of sludge and large granular impurity, then by removing Cloud of dust road removes part dust；It is passed through cleaning solution so that cleaning solution contacts washing with flue gas in void tower, the cleaning solution includes The raw material of following parts by weight：50 parts of hydrogen peroxide, 5 parts of sodium hydrate particle, 5 parts of empgen BB, sodium carboxymethylcellulose 3 Part.
（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent, when thick depriving hydrogen sulphide reactor effluent The μ g.g of middle hydrogen sulfide sulfur content >=15-1When be switched to standby reactor, former reactor is heated to 80 DEG C, gravity-flow ventilation makes often Warm ferric oxide desulfurizer regeneration；The operation temperature of thick depriving hydrogen sulphide reactor is 50 DEG C, and operating pressure is 3MPa, and air speed is 800h-1。
（3）One-level fine de-sulfur：One-level fine de-sulfur reactor is passed through by the flue gas of thick depriving hydrogen sulphide, normal temperature activated carbon is used Desulfurizing agent carries out one-level fine de-sulfur, as the μ g.g of hydrogen sulfide sulfur content in thick depriving hydrogen sulphide reactor effluent >=0.3-1When be switched to Standby reactor, is heated to 60 DEG C, gravity-flow ventilation regenerates normal temperature activated carbon desulphurization agent by former reactor；One-level fine de-sulfur is anti- The operation temperature for answering device is 58 DEG C, and operating pressure is 5MPa, and air speed is 1200h-1。
（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfur reactors are passed through by the flue gas of one-level fine de-sulfur, molecular sieve sweetneing is used Agent carries out two grades of fine de-sulfurs, as the μ g.g of hydrogen sulfide sulfur content in one-level fine de-sulfur reactor effluent >=0.1-1When be switched to it is standby Reactor, 140 DEG C of nitrogen helium mixture is passed through into former reactor, molecular sieve desulfurizer is regenerated.In nitrogen helium mixture The content of nitrogen is 70%, and the content of helium is 30%.The operation temperature of two grades of fine de-sulfur reactors is 80 DEG C, and operating pressure is 8MPa, air speed is 1500h-1.Thick depriving hydrogen sulphide reactor, one-level fine de-sulfur reactor, two grades of fine de-sulfur reactors are kept wherein One unlatching, two other state closed.
The desulfuration efficiency of the present embodiment is 89%.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, also should be regarded as the present invention Protection domain.

Claims (8)

1. a kind of fume environment protection sulfur removal technology, it is characterised in that comprise the following steps：
（1）The dedusting and washing of flue gas：Flue gas is set to remove part dust by dust-removing flue；It is passed through cleaning solution so that cleaning solution Washing is contacted in void tower with flue gas, the cleaning solution includes the raw material of following parts by weight：40~50 parts of hydrogen peroxide, sodium hydroxide 5~10 parts of particle, 1~5 part of empgen BB, 1~3 part of sodium carboxymethylcellulose；
（2）Thick depriving hydrogen sulphide：Thick desulfurization is carried out using normal temperature iron oxide desulfurizing agent, when sulphur in thick depriving hydrogen sulphide reactor effluent Change the μ g.g of hydrogen sulfur content >=15-1When be switched to standby reactor, former reactor is heated to 60~80 DEG C, gravity-flow ventilation makes often Warm ferric oxide desulfurizer regeneration；
（3）One-level fine de-sulfur：One-level fine de-sulfur reactor is passed through by the flue gas of thick depriving hydrogen sulphide, normal temperature active carbon desulfurization is used Agent carries out one-level fine de-sulfur, as the μ g.g of hydrogen sulfide sulfur content in thick depriving hydrogen sulphide reactor effluent >=0.3-1When be switched to it is standby Reactor, is heated to 50~60 DEG C, gravity-flow ventilation regenerates normal temperature activated carbon desulphurization agent by former reactor；
（4）Two grades of fine de-sulfurs：Two grades of fine de-sulfur reactors are passed through by the flue gas of one-level fine de-sulfur, are entered using molecular sieve desulfurizer Two grades of fine de-sulfurs of row, as the μ g.g of hydrogen sulfide sulfur content in one-level fine de-sulfur reactor effluent >=0.1-1When be switched to standby reaction Device, 120~150 DEG C of nitrogen helium mixture is passed through into former reactor, molecular sieve desulfurizer is regenerated.
2. fume environment protection sulfur removal technology according to claim 1, it is characterised in that the cleaning solution includes following parts by weight Raw material：46 parts of hydrogen peroxide, 8 parts of sodium hydrate particle, 3 parts of empgen BB, 2 parts of sodium carboxymethylcellulose.
3. fume environment protection sulfur removal technology according to claim 1, it is characterised in that the step（1）Needed before flue gas ash removal Most of sludge and large granular impurity are removed by gravity settling chamber.
4. fume environment protection sulfur removal technology according to claim 1, it is characterised in that the behaviour of the thick depriving hydrogen sulphide reactor It is 40~50 DEG C to make temperature, and operating pressure is 1~3MPa, and air speed is 500~800h-1。
5. fume environment protection sulfur removal technology according to claim 1, it is characterised in that the behaviour of the one-level fine de-sulfur reactor It is 50~60 DEG C to make temperature, and operating pressure is 3~5MPa, and air speed is 900~1200h-1。
6. fume environment protection sulfur removal technology according to claim 1, it is characterised in that the behaviour of two grades of fine de-sulfur reactors It is 60~80 DEG C to make temperature, and operating pressure is 5~8MPa, and air speed is 1200~1500h-1。
7. fume environment protection sulfur removal technology according to claim 1, it is characterised in that the thick depriving hydrogen sulphide reactor, one Level fine de-sulfur reactor, two grades of fine de-sulfur reactors keep one of and opened, two other state closed.
8. fume environment protection sulfur removal technology according to claim 1, it is characterised in that nitrogen in the nitrogen helium mixture Content is 60~70%, and the content of helium is 30~40%.
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