CN109157974A - A kind of cooling protection system and method being applicable in activated coke dry method - Google Patents

A kind of cooling protection system and method being applicable in activated coke dry method Download PDF

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Publication number
CN109157974A
CN109157974A CN201811238691.3A CN201811238691A CN109157974A CN 109157974 A CN109157974 A CN 109157974A CN 201811238691 A CN201811238691 A CN 201811238691A CN 109157974 A CN109157974 A CN 109157974A
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activated coke
adsorption reaction
coke adsorption
temperature
gas
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刘静
傅月梅
黄丽娜
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SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY Co Ltd
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SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN201811238691.3A priority Critical patent/CN109157974A/en
Publication of CN109157974A publication Critical patent/CN109157974A/en
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a kind of cooling protection system and method for being applicable in activated coke dry method, the cooling protection system for being applicable in activated coke dry method includes: activated coke adsorption reaction system for purifying former flue gas；For providing the feedway of heat-exchange gas；And heat exchanger；Activated coke adsorption reaction system is equipped with the temperature sensor for detecting active focus layer temperature, for the inlet air stack into former flue gas, and goes out after former flue gas is cleaned to be formed by the outlet flue of tail gas；The outlet flue of activated coke adsorption reaction system is equipped with the oxygen level sensor for oxygen content in detection pipe.The present invention is safely and effectively and reliable, operational excellence and easy to operate and realize；By gas cooling protection measure, accelerate the speed that gas takes away heat, reduces the dosage of protection gas, as early as possible the normal operation of recovery system, reduce operating cost, and reduce the idleness of system；Inhibit to burn without system shutdown, no hardened phenomenon ensure that the working efficiency of system.

Description

A kind of cooling protection system and method being applicable in activated coke dry method
Technical field
The present invention relates to environmental technology field, espespecially a kind of cooling protection system and method for being applicable in activated coke dry method.
Background technique
SO of the activated coke dry cleaning technology using activated coke as adsorbent, in adsorbing and removing flue gas2, complete the work after adsorbing Property coke by heating method regenerate, the high concentration SO desorbed2Mixed gas can directly produce 98% commodity sulfuric acid, realize sulphur Recycling.Using the catalysis of activated coke, the NOx in flue gas is reduced into N by the ammonia by appropriate ammonia nitrogen than addition2And water, Denitration efficiency is up to 80% or more.In addition, having preferable removal effect to heavy metal, the dioxin in flue gas.Subtractive process There is no waste water, waste residue to generate, the technology is widely used in steel sintering pelletizing flue gas, fire coal boiler fume, coloured smelting at present It refines flue gas, chemical industry sulfuric acid tail gas, flue gases of cock oven, petrochemical industry and cracks flue gas, building materials furnace flue gas.
The kindling of prevention and control activated coke in dry cleaning device, is the premise of guarantee system safe and stable operation. Adsorbent is activated coke in purification device, and binder carbonization-activation is added through milling by raw coal such as coking coal, bituminous coal and forms, normal Fire point is greater than 400 DEG C, and the oxidation resistance of activated coke itself is poor, and contacting with oxygen can occur slowly to aoxidize and spontaneous combustion, activated coke The specific surface area that the dust left after abrasion has specific activity coke bigger, activity is stronger, in bed moving process, is enclosed in work Property coke around, reach ignition point meet oxygen enough then can spontaneous combustion immediately, be easy to happen safety accident.In addition, due to inlet flue gas The factors such as temperature control is improper, flow of flue gas uniformity is uneven, the flowing of activated coke solid material is unsmooth, system leakage oxygen are likely to Cause active focus layer the hot spot of part occur, also needs for activated coke in purification device to be discharged under serious conditions.Patent CN20100255775.6 proposes steam smoothering method, and a low pressure steam pipe is installed near desulfurization adsorbent bed, accesses low Steam is pressed, control valve is installed on low pressure steam pipe, when focus layer kindling, closes flue gas control valve cutting flue gas drum immediately Enter, then opens steam control valve and be passed through low pressure saturated steam, oxygen is isolated, inhibit burning, but after steam smoothering Activated coke must discharger cause Flow of Goods and Materials unsmooth and since vapor action coke powder is easy hardened.
Therefore, how to provide it is a kind of safely and effectively and do not influence system work safety measure be those skilled in the art urgently Problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of cooling protection system and methods for being applicable in activated coke dry method, safely and effectively and can It leans on, operational excellence and easy to operate and realize；By gas cooling protection measure, accelerate the speed that gas takes away heat, reduces The dosage of gas is protected, as early as possible the normal operation of recovery system, reduces operating cost, and reduce the idleness of system；Without system It stops transport and inhibits burning (need to only stop being passed through for former flue gas), no hardened phenomenon ensure that the working efficiency of system.
Technical solution provided by the invention is as follows:
A kind of cooling protection system being applicable in activated coke dry method, comprising:
For purifying the activated coke adsorption reaction system of former flue gas；
For providing the feedway of heat-exchange gas；And
Heat exchanger；
The activated coke adsorption reaction system is equipped with the temperature sensor for detecting active focus layer temperature, is used for into former cigarette The inlet air stack of gas, and go out after former flue gas is cleaned to be formed by the outlet flue of tail gas；
The outlet flue of the activated coke adsorption reaction system is equipped with the oxygen level sensor for oxygen content in detection pipe；
When the temperature of the activity focus layer meets safe preset condition, former flue gas stopping flows to activated coke adsorption reaction system System, rear heat-exchange gas are discharged after flowing through the activated coke adsorption reaction system；Go out after former flue gas is cleaned afterwards and is formed by tail When the inside oxygen content of the outlet flue of gas is lower than 3%, the feedway is closed, and heat-exchange gas is in the heat exchanger and institute The circulation of activated coke adsorption reaction system circulation is stated, so that the heat-exchange gas after the heating of active focus layer is cooling through the heat exchanger Flow to the activated coke adsorption reaction system again afterwards；Afterwards when the temperature of the active focus layer is lower than preset value, the heat exchanger is closed It closes.
In the technical program, by detecting the temperature of active focus layer and when the temperature of active focus layer meets safe preset condition When, then stop former flue gas and circulates, other cleaning equipments normal operation (for example activated coke absorption regeneration system operates normally, material Conveying is normally carried out), it is passed through recuperated gas and the former flue gas progress adsorption cleaning that air flow power will be trapped in internal system is provided And whole system is discharged, so that the former flue gas for avoiding being trapped in system mixes with heat-exchange gas and influences heat-exchange gas Heat exchange efficiency or influence (corrosion of such as pipeline) to heat-exchange system are directly exhausted from system；Further, in order to keep away Exempt from high-temperature activated coke (dust especially formed after activated coke abrasion) to meet oxygen oxidation and dieseling occurs, and then pacifies Full accident, therefore, heat-exchange gas flows to system until the oxygen content inside outlet flue is lower than 3%, to guarantee that activated coke exists Adsorption process is in hypoxia, to guarantee that high temperature active coke recycles safely under anaerobic environment；Further, due to heat exchange Gas is gas, will not cause coke powder hardened as low pressure water vapor, and the activated coke in system also needs to be discharged；Further Ground, system restore very fast, small on the influence of the desulphurization denitration performance indicator of whole system, improve the stability of system；Further, Nitrogen circulation utilizes, and reduces energy consumption, saves operating cost；In summary, this system is safely and effectively and reliable, operational excellence and easily In operation and realize；By gas cooling protection measure, accelerate the speed that gas takes away heat, reduces the dosage of protection gas, to the greatest extent The normal operation of fast recovery system, reduces operating cost, and reduce the idleness of system；Inhibit burning (only without system shutdown Need to stop being passed through for former flue gas), no hardened phenomenon ensure that the working efficiency and operation stability of system；Nitrogen circulation utilizes, Energy consumption is reduced, operating cost is saved.
It is further preferred that the temperature that the safe preset condition is the active focus layer be greater than the temperature 20 of former flue gas~ The temperature rise rate of 30 DEG C and/or the active focus layer is greater than 0.2 DEG C/min；And/or the preset value is equal to the temperature of former flue gas Degree；And/or the temperature sensor is several；And/or each layer of active focus layer is equipped at least one described temperature sensor.
In the technical program, the temperature of active focus layer be higher than into the former flue gas of activated coke adsorption reaction system temperature or Cooling and anoxic treatment then are carried out to activated coke when heating up excessively high.Due to being equipped with multiple activated cokes in activated coke adsorption reaction system Layer, therefore, each active settable one or more temperature sensor of focus layer, thus reduce as far as possible active focus layer because Hot localised points and the spontaneous combustion security risk occurred.
It is further preferred that further including for providing the air source device of air to the activated coke adsorption reaction system； When the stopping of former flue gas flows to activated coke adsorption reaction system, the feedway is closed, and the activated coke adsorption reaction system is closed Close, air is discharged after flowing to the activated coke adsorption reaction system, after be lower than when the temperature that the temperature sensor detects When the oxygen content that 35 DEG C and the oxygen level sensor detect is higher than 20%, the activated coke adsorption reaction system enters maintenance State.
In the technical program, when activated coke adsorption reaction system needs to overhaul, then halt system stoppage in transit is needed to handle, but Staff, which enters in activated coke adsorption system, to be needed to meet some requirements just enter when overhauling, otherwise in system Sulfuric acid, ammonia, anaerobic environment etc. can have an adverse effect to staff.Drive the gas in system away by air and make be Oxygen content in system is suitable with the amount of oxidation in air, and is lower than certain temperature, ensures that the personal safety of staff And ensure that staff overhauls in time, shorten repair process and time, reduces system idleness.
It is further preferred that the activated coke adsorption reaction system includes at least one activated coke adsorption reaction device；Often One activated coke adsorption reaction device is designed with the temperature sensor for detecting active focus layer temperature, is used for into original The inlet air stack of flue gas, and the outlet flue of tail gas is formed by after former gas cleaning out；Each described activated coke absorption The outlet flue of reaction unit is equipped with the oxygen level sensor for oxygen content in detection pipe；Each described activated coke absorption is anti- Device is answered to be connected to the flue gas device for providing former flue gas, and each activated coke adsorption reaction device and the flue gas The first valve is equipped between device；Each described activated coke adsorption reaction device is connected to the feeder, and each The second valve is equipped between the activated coke adsorption reaction device and the feeder；Each described activated coke adsorption reaction Device is connected to the heat exchanger, and third valve is equipped between each activated coke adsorption reaction device and the heat exchanger Door；It is anti-with the activated coke absorption when temperature of the active focus layer of any activated coke adsorption reaction device meets safe preset condition The first valve for answering device to be correspondingly arranged is closed, so that former flue gas stopping flows to the activated coke adsorption reaction device；Heat exchange afterwards Gas is discharged after flowing through the activated coke adsorption reaction device；The former flue gas that goes out of the activated coke adsorption reaction device is cleaned rear institute afterwards When the inside oxygen content of the outlet flue of the tail gas of formation is lower than 3%, be correspondingly arranged with the activated coke adsorption reaction device the Two valves are closed, and heat-exchange gas is in the heat exchanger and the activated coke adsorption reaction device circulation, so that through activated coke Heat-exchange gas after layer heating flows to the activated coke adsorption reaction device after the heat exchanger is cooling again；Afterwards when the temperature The temperature that sensor detects is lower than preset value, closes with the third valve that the activated coke adsorption reaction device is correspondingly arranged.
In the technical program, when activated coke adsorption reaction system includes at least one activated coke adsorption reaction device, then often One activated coke adsorption reaction device individually can carry out cooling and anoxic treatment to activated coke, can normally transport without influencing other Capable activated coke adsorption reaction device has specific aim, to ensure that the working efficiency of system.To original device change compared with It is small, only increase a heat exchanger and valve, piping connection, and heat exchanger is conventional equipment, circulation system is simple, and control is held Easily, easy to maintain.
It is further preferred that the outlet flue of each activated coke adsorption reaction device is equipped with the 4th valve；With/ Or, the oxygen level sensor is set to each described activated coke adsorption reaction device and fills with the activated coke adsorption reaction It sets between the third valve being correspondingly arranged；And/or second valve be set to each described activated coke adsorbent equipment with And between first valve being correspondingly arranged with the activated coke adsorption reaction device.
In the technical program, ensure that each activated coke adsorption reaction device is individually transported by the open and close of valve Row, maintenance, security risk processing,
The invention also discloses a kind of temperature-reduction protectives for being applicable in activated coke dry method, comprising steps of
When the temperature of the active focus layer of activated coke adsorption reaction internal system meets safe preset condition, former flue gas stops The activated coke adsorption reaction system is flowed to, rear heat-exchange gas is discharged after flowing through activated coke adsorption reaction system；Go out former cigarette afterwards Gas is formed by the inside oxygen content of the outlet flue of tail gas lower than 3% after being cleaned when, for providing the confession of heat-exchange gas It is closed to device, heat-exchange gas circulates in heat exchanger and activated coke adsorption reaction system circulation, so that heating up through active focus layer Heat-exchange gas afterwards flows to the activated coke adsorption reaction system after heat exchanger is cooling again；Afterwards when the temperature of active focus layer is low In preset value, heat exchanger is closed.
In the technical program, by detecting the temperature of active focus layer and when the temperature of active focus layer meets safe preset condition When, then stop former flue gas and circulates, other cleaning equipments normal operation (for example activated coke absorption regeneration system operates normally, material Conveying is normally carried out), it is passed through recuperated gas and the former flue gas progress adsorption cleaning that air flow power will be trapped in internal system is provided And whole system is discharged, so that the former flue gas for avoiding being trapped in system mixes with heat-exchange gas and influences heat-exchange gas Heat exchange efficiency or influence (corrosion of such as pipeline) to heat-exchange system are directly exhausted from system；Further, in order to keep away Exempt from high-temperature activated coke (dust especially formed after activated coke abrasion) to meet oxygen oxidation and dieseling occurs, and then pacifies Full accident, therefore, heat-exchange gas flows to system until the oxygen content inside outlet flue is lower than 3%, to guarantee that activated coke exists Adsorption process is in hypoxia, to guarantee that high temperature active coke recycles safely under anaerobic environment；Further, due to heat exchange Gas is gas, will not cause coke powder hardened as low pressure water vapor, and the activated coke in system also needs to be discharged；Further Ground, system restore very fast, small on the influence of the desulphurization denitration performance indicator of whole system, improve the stability of system；Further, Nitrogen circulation utilizes, and reduces energy consumption, saves operating cost；In summary, this method is safely and effectively and reliable, operational excellence and easily In operation and realize；By gas cooling protection measure, accelerate the speed that gas takes away heat, reduces the dosage of protection gas, to the greatest extent The normal operation of fast recovery system, reduces operating cost, and reduce the idleness of system；Inhibit burning (only without system shutdown Need to stop being passed through for former flue gas), no hardened phenomenon ensure that the working efficiency and operation stability of system；Nitrogen circulation utilizes, Energy consumption is reduced, operating cost is saved.
It is further preferred that the temperature that the safe preset condition is the active focus layer be greater than the temperature 20 of former flue gas~ The temperature rise rate of 30 DEG C and/or the active focus layer is greater than 0.2 DEG C/min；And/or the preset value is equal to the temperature of former flue gas Degree；And/or the temperature sensor is several；And/or each layer of active focus layer is equipped at least one described temperature sensor.
In the technical program, the temperature of active focus layer be higher than into the former flue gas of activated coke adsorption reaction system temperature or Cooling and anoxic treatment then are carried out to activated coke when heating up excessively high.Due to being equipped with multiple activated cokes in activated coke adsorption reaction system Layer, therefore, each active settable one or more temperature sensor of focus layer, thus reduce as far as possible active focus layer because Hot localised points and the spontaneous combustion security risk occurred.
It is further preferred that the feedway is closed when former flue gas stopping flows to the activated coke adsorption reaction system, The activated coke adsorption reaction system is closed, and air is discharged after flowing to the activated coke adsorption reaction system, after when the work Property focus layer temperature go out the inside oxygen of the outlet flue for being formed by tail gas after former flue gas is cleaned lower than 35 DEG C and after described and contain When amount is higher than 20%, the activated coke adsorption reaction system enters inspecting state.
In the technical program, when activated coke adsorption reaction system needs to overhaul, then halt system stoppage in transit is needed to handle, but Staff, which enters in activated coke adsorption system, to be needed to meet some requirements just enter when overhauling, otherwise in system Sulfuric acid, ammonia, anaerobic environment etc. can have an adverse effect to staff.Drive the gas in system away by air and make be Oxygen content in system is suitable with the amount of oxidation in air, and is lower than certain temperature, ensures that the personal safety of staff And ensure that staff overhauls in time, shorten repair process and time, reduces system idleness.
It is further preferred that the temperature of the active focus layer of any activated coke adsorption reaction device meets safe preset condition When, it is closed with the first valve that the activated coke adsorption reaction device is correspondingly arranged, so that former flue gas stopping flows to activated coke suction Reaction enclosure device；Heat-exchange gas is discharged after flowing through the activated coke adsorption reaction device afterwards；The activated coke adsorption reaction device afterwards The outlet flue for going out after former flue gas is cleaned to be formed by tail gas inside oxygen content lower than 3% when, adsorbed with the activated coke The second valve that reaction unit is correspondingly arranged is closed, and heat-exchange gas is followed in the heat exchanger and the activated coke adsorption reaction device Circulation is logical, so that the heat-exchange gas after the heating of active focus layer flows to activated coke absorption instead again after the heat exchanger is cooling Answer device；The temperature detected afterwards when the temperature sensor is described to be set to the activated coke adsorption reaction lower than preset value Third valve between device and the heat exchanger is closed, wherein the activated coke adsorption reaction system includes at least one work Property coke adsorption reaction device；Each described activated coke adsorption reaction device is designed with for detecting described in active focus layer temperature Temperature sensor is formed by the outlet flue of tail gas for the inlet air stack into former flue gas, and out after former gas cleaning；Often The outlet flue of one activated coke adsorption reaction device is equipped with the oxygen level sensor for oxygen content in detection pipe；It is each A activated coke adsorption reaction device is connected to the flue gas device for providing former flue gas, and each described activated coke absorption First valve is equipped between reaction unit and the flue gas device；Each described activated coke adsorption reaction device with it is described Feeder connection, and second valve is equipped between each activated coke adsorption reaction device and the feeder Door；Each described activated coke adsorption reaction device is connected to the heat exchanger, and each described activated coke adsorption reaction dress It sets and is equipped with the third valve between the heat exchanger.
In the technical program, when activated coke adsorption reaction system includes at least one activated coke adsorption reaction device, then often One activated coke adsorption reaction device individually can carry out cooling and anoxic treatment to activated coke, can normally transport without influencing other Capable activated coke adsorption reaction device has specific aim, to ensure that the working efficiency of system.To original device change compared with It is small, only increase a heat exchanger and valve, piping connection, and heat exchanger is conventional equipment, circulation system is simple, and control is held Easily, easy to maintain.
It is further preferred that described when the temperature of active focus layer is lower than preset value, heat exchanger closing specifically includes step:
After the temperature of activated coke activity focus layer is lower than preset value, and all activated cokes complete an absorption regeneration circulation, The heat exchanger is closed, and heat-exchange gas stops at the heat exchanger and the activated coke adsorption reaction system circulates；It is former afterwards Flue gas enters activated coke adsorption reaction system and is purified.
In the technical program, system restores very fast, and small, raising system is influenced on the desulphurization denitration performance indicator of whole system Stability.
A kind of cooling protection system and method being applicable in activated coke dry method provided by the invention, can bring following at least one Kind the utility model has the advantages that
1, in the present invention, system operational safety is effectively and reliable, operational excellence and easy to operate and realize, easy to maintain； By gas cooling protection measure, accelerate the speed that gas takes away heat, reduce the dosage of protection gas, recovery system is being just as early as possible Often operation reduces operating cost, and reduces the idleness of system；Burning is inhibited (need to only to stop former flue gas without system shutdown It is passed through), no hardened phenomenon ensure that the working efficiency and operation stability of system；Nitrogen circulation utilizes, and reduces energy consumption, saves Operating cost；This system is small to the change of original device, requires new equipment small；Heat-exchange gas circulating cooling will not make material At destruction, be not in the unfavorable factors such as hardened, Flow of Goods and Materials is not influenced, and system restores very fast, to whole system The influence of desulphurization denitration performance indicator is small, improves the stability of system.Nitrogen circulation utilizes, and reduces energy consumption, saves operating cost.
2, in the present invention, when activated coke adsorption reaction system includes at least one activated coke adsorption reaction device, flexibility Greatly, each activated coke adsorption reaction device is equipped with corresponding circulation line, and when as circulating cooling system, a certain activated coke is inhaled When reaction enclosure device occurs abnormal, corresponding pipe valve is opened, other activated coke adsorption reaction devices are not influenced； When carrying out repair and maintenance as ventilatory, it can integrally overhaul, actual conditions separate unit purification device repair and maintenance can also be combined. With strong points and flexibility is big, ensure that the working efficiency of system, and heat-exchange gas circulation system is simple, and control is held Easily, easy to maintain.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to the drop for being applicable in activated coke dry method Above-mentioned characteristic, technical characteristic, advantage and its implementation of temperature protection system and method are further described.
Fig. 1 is a kind of embodiment schematic diagram for the cooling protection system that the present invention is applicable in activated coke dry method.
Drawing reference numeral explanation:
1. former flue gas air inlet main chimney flue, 2. booster fans, the first valve of 3-1. one, the first valve of 3-2. two, 3-3. first Valve three, the first valve of 3-4. four, the second valve of 4-1. one, the second valve of 4-2. two, the second air intake valve of 4-3. three, 4-4. Two valves four, 5-1. activated coke adsorption reaction device one, 5-2. activated coke adsorption reaction device two, 5-3. activated coke adsorption reaction Device three, 5-4. activated coke adsorption reaction device four, 6-1. oxygen level sensor one, 6-2. oxygen level sensor two, 6-3. oxygen Content level sensor three, 6-4. oxygen level sensor four, 7-1. third valve one, 7-2. third valve two, 7-3. third valve three, 7-4. third valve four, the 4th valve one of 8-1., the 4th valve two of 8-2., the 4th valve three of 8-3., the 4th valve four of 8-4., 9. Tail gas outlet main chimney flue, 10. heat exchangers, 11. ventilating fans, 12. heat-exchange gas inlet manifolds, 13. air inlet general pipeline.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, their not generations Its practical structures as product of table.In addition, there is identical structure or function in some figures so that simplified form is easy to understand Component, only symbolically depict one of those, or only marked one of those.Herein, "one" not only table Show " only this ", can also indicate the situation of " more than one ".Herein, it should be noted that unless otherwise specific Regulation and restriction, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to It is detachably connected, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also lead to It crosses intermediary to be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be with Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In example 1, as shown in Figure 1, a kind of cooling protection system for being applicable in activated coke dry method, comprising: for purifying The activated coke adsorption reaction system of former flue gas；For providing the feedway of heat-exchange gas；And heat exchanger 10；Activated coke Adsorption reaction system is equipped with the temperature sensor for detecting active focus layer temperature, for the inlet air stack into former flue gas, and Former flue gas is formed by the outlet flue of tail gas out after being cleaned；The outlet flue of activated coke adsorption reaction system is equipped with for examining The oxygen level sensor of oxygen content in test tube；When the temperature of active focus layer meets safe preset condition, former flue gas stops flow direction and lives Property coke adsorption reaction system, rear heat-exchange gas are discharged after flowing through activated coke adsorption reaction system；After former flue gas is cleaned out afterwards When being formed by the inside oxygen content of the outlet flue of tail gas lower than 3%, feedway is closed, and heat-exchange gas is in heat exchanger 10 It circulates with activated coke adsorption reaction system circulation, so that the heat-exchange gas after the heating of active focus layer is after heat exchanger 10 is cooling Activated coke adsorption reaction system is flowed to again；Afterwards when the temperature that temperature sensor detects is lower than preset value, heat exchanger 10 is closed.
In practical applications, one is reach burning point and contain in the oxygen that oxygen content meets spontaneous combustion for the condition of activated coke spontaneous combustion Amount, therefore, when active focus layer high temperataure phenomena occurs due to former smoke reaction heat production, then by heat-exchange gas to high temperature active Coke carries out cooling processing, and by heat-exchange gas with the oxygen content in reduction system, so that system is in anaerobic environment, thus The activated coke flowed in system is avoided spontaneous combustion hidden danger occur.It is worth noting that being due to needing heat-exchange gas needs to drive Former flue gas and oxygen in system, because heat-exchange gas is not oxygen-containing, it is preferable that in order to avoid heat-exchange gas and activated coke or Gas in system reacts and influences circulating cooling system, and therefore, heat-exchange gas is preferably nitrogen or inert gas.More Excellent, it is discharged in entire circulating cooling process without activated coke, it is easy to operate, it is (existing to simplify existing cumbersome discharging operations Technology needs to be discharged activated coke, and the activated coke of discharger needs additional place to stack, and system needs for activated coke to be added after restoring It is cumbersome into system), to save system operation cost, and reduce the idleness of system.
It in example 2, further include for activated coke adsorption reaction as shown in Figure 1, on the basis of example 1 The air source device of system offer air；When the stopping of former flue gas flows to activated coke adsorption reaction system, feedway is closed, activity Burnt adsorption reaction system is closed, air is discharged after flowing to activated coke adsorption reaction system, after detected when temperature sensor For temperature lower than 35 DEG C and when oxygen content that oxygen level sensor detects is higher than 20%, activated coke adsorption reaction system enters maintenance State.Preferably, air enters activated coke adsorption reaction system by ventilating fan 11.Preferably, heat-exchange gas also by Blower enters activated coke adsorption reaction system.In practical applications, in order to reduce the cost of system, heat-exchange gas and air are logical It crosses the same blower and enters activated coke adsorption reaction system, i.e., heat-exchange gas is passed through by the heat-exchange gas that feedway comes out Inlet manifold 12 and the air come out from air source device are connected to by air inlet general pipeline 13 with blower, i.e., heat-exchange gas into It is connected to after 13 parallel connection of gas general pipeline 12 and air inlet general pipeline with blower.Preferably, heat-exchange gas inlet manifold 12 and air into Gas general pipeline 13 is respectively equipped with the 5th valve and the 6th valve.Further, the 5th valve and the 6th valve are all set in blower Front end.Preferably, former flue gas passes through former flue gas air inlet main chimney flue 1 into activated coke adsorption reaction system.Preferably, former flue gas into Gas main chimney flue 1 is equipped with the 7th valve.Preferably, former flue gas enters activated coke adsorption reaction system, and the 7th by booster fan 2 Valve is set to the front end of booster fan 2.
In the third embodiment, as shown in Figure 1, on the basis of embodiment one or two, safe preset condition is active focus layer The temperature rise rate of temperature 20~30 DEG C of the temperature and/or active focus layer that are greater than former flue gas be greater than 0.2 DEG C/min.In practical application In, when the temperature of temperature sensor detection is higher than former 20~30 DEG C of flue-gas temperature, while carrying out circulating cooling to activated coke.It is worth saying It is bright, since the temperature of different types of former flue gas is different, as long as the temperature of temperature sensor detection is higher by former flue gas 20~30 DEG C of temperature just carry out circulating cooling.It specifically, can be default to the temperature sensor set temperature of variety classes original flue gas Value, the preset value are higher by the arbitrary value in 20~30 DEG C of former flue-gas temperature, and certainly, the minimum of preset value is also high than former flue gas In 10 DEG C, and the peak of preset value is also higher than 50 DEG C than former flue gas, or even also higher than 50 DEG C.Preferably, preset value is equal to The temperature of former flue gas.Certainly, preset value can also a little higher than former flue gas temperature (such as 0~5 DEG C of plateau flue-gas temperature), preset value is also The temperature (such as low former 0~10 DEG C of flue-gas temperature) of former flue gas can be slightly less than.Preferably, settable one of temperature sensor, can also It is arranged multiple.And since in practical application, activated coke adsorption reaction system is to for SO2Mixed gas, NOx can be respectively provided to Few one layer of active focus layer, therefore, at least one temperature sensor is arranged in each active focus layer, when temperature sensor is multiple When, multiple temperature sensors can arrange different location, to increase the control of the temperature of active focus layer.It is worth noting that temperature The function of degree sensor can only detect temperature；The function of temperature sensor can only detect the temperature rise rate of temperature；Temperature The function of degree sensor can also can detect temperature and detect the temperature rise rate of temperature.As long as and temperature or temperature rise rate its In the temperature that detects of temperature sensor when meeting safe preset condition, circulating cooling system begins to run, and works as institute When the temperature that some temperature sensors detect is lower than preset value, heat exchanger 10 is just closed.
In example IV, as shown in Figure 1, on the basis of embodiment one, two or three, activated coke adsorption reaction system packet Include at least one activated coke adsorption reaction device (one 5-1 of activated coke adsorption reaction device, two 5-2 of activated coke adsorption reaction device, Three 5-3 of activated coke adsorption reaction device, four 5-4...... of activated coke adsorption reaction device)；Each activated coke adsorption reaction dress The temperature sensor being designed with for detecting active focus layer temperature is set, for the inlet air stack into former flue gas, and goes out former flue gas The outlet flue of tail gas is formed by after purification；The outlet flue of each activated coke adsorption reaction device, which is equipped with, is used for detection pipe Interior oxygen content oxygen level sensor (one 6-1 of oxygen level sensor, two 6-2 of oxygen level sensor, three 6-3 of oxygen level sensor, Four 6-1...... of oxygen level sensor)；Each activated coke adsorption reaction device connects with the flue gas device for providing former flue gas It is logical, and the first valve (one 3-1 of the first valve, the first valve are equipped between each activated coke adsorption reaction device and flue gas device Door two 3-2, three 3-3 of the first valve, four 3-4...... of the first valve)；Each activated coke adsorption reaction device and feeder Connection, and the second valve (one 4-1 of the second valve, second are equipped between each activated coke adsorption reaction device and feeder Two 4-2 of valve, three 4-3 of the second valve, four 4-4...... of the second valve)；Each activated coke adsorption reaction device and heat exchanger 10 connections, and third valve (one 7-1 of third valve, the are equipped between each activated coke adsorption reaction device and heat exchanger 10 Three valves, two 7-2, three 7-3 of third valve, four 7-4...... of third valve)；The activated coke of any activated coke adsorption reaction device When the temperature of layer meets safe preset condition, closed with the first valve that the activated coke adsorption reaction device is correspondingly arranged, so that Former flue gas stopping flows to the activated coke adsorption reaction device；Heat-exchange gas flows through the activated coke adsorption reaction device heel row afterwards Out；The inside oxygen content of the outlet flue for going out after former flue gas is cleaned to be formed by tail gas of the activated coke adsorption reaction device afterwards When lower than 3%, closed with the second valve that the activated coke adsorption reaction device is correspondingly arranged, heat-exchange gas is in 10 He of heat exchanger The activated coke adsorption reaction device circulation, so that the heat-exchange gas after the heating of active focus layer is after heat exchanger 10 is cooling The activated coke adsorption reaction device is flowed to again；Afterwards when the temperature that temperature sensor detects is lower than preset value, with activated coke suction The third valve that reaction enclosure device is correspondingly arranged is closed.
Preferably, the outlet flue of each activated coke adsorption reaction device be equipped with the 4th valve (one 8-1 of the 4th valve, 4th valve, two 8-2, three 8-3 of the 4th valve, four 8-4...... of the 4th valve).Preferably, oxygen level sensor is set to each Between a activated coke adsorption reaction device and the third valve being correspondingly arranged with activated coke adsorption reaction device.Preferably, Two valves are set between each activated coke adsorbent equipment and the first valve being correspondingly arranged with activated coke adsorption reaction device.
Specifically, along the circulating direction of former flue gas, the front end of each activated coke adsorption reaction device is equipped with one and is used for Into the first branch pipe of former flue gas, when activated coke adsorption reaction device is several, multiple activated coke adsorption reaction device correspondences are set It is connected to after the first branch pipe set is in parallel with former flue gas air inlet main chimney flue 1, and each first branch pipe is equipped with first valve； The rear end of each activated coke adsorption reaction device is equipped with one for going out the second branch pipe of tail gas, when activated coke adsorption reaction device When being several, it is connected to after the second branch pipe that multiple activated coke adsorption reaction devices are correspondingly arranged is in parallel with tail gas outlet main chimney flue 9, And each second branch pipe is equipped with the 4th valve；The front end of each activated coke adsorption reaction device be equipped with one for into The third branch pipe of heat-exchange gas, when activated coke adsorption reaction device is several, multiple activated coke adsorption reaction devices are corresponding It is connected to after the third branch pipe of setting is in parallel with heat-exchange gas inlet manifold 12, and each third air intake branch is equipped with one Second valve；The rear end of each activated coke adsorption reaction device is equipped with one for going out the 4th branch pipe of heat-exchange gas, works as work Property coke adsorption reaction device when being several, handed over after the 4th branch pipe that multiple activated coke adsorption reaction devices are correspondingly arranged is in parallel with heat The body inlet manifold 12 that takes a breath is connected to, and each 4th branch pipe is equipped with a third valve.Preferably, the first branch pipe and third It is connected to, is connected to after the second branch pipe and the parallel connection of the 4th branch pipe with outlet flue, the second branch pipe is in parallel with inlet air stack after branch pipe is in parallel It is connected to afterwards with exhaust emissions pipeline.It is connected to after multiple third branch pipes are in parallel with heat-exchange gas inlet manifold 12；Multiple 4th It is connected to after pipe is in parallel with heat exchanger 10.It is worth noting that heat exchanger 10 be used for cool down heat-exchange gas fluid can for lower than The fluid of former flue gas, such as air, cold air, water.
Preferably, activated coke adsorption reaction device is to for SO2At least one layer of activity can be respectively set in mixed gas, NOx At least one temperature sensor is arranged in focus layer, therefore, each active focus layer, when temperature sensor is multiple, multiple temperature Sensor can arrange different location, to increase the control of the temperature of active focus layer.It is worth noting that the function of temperature sensor It can only detect temperature；The function of temperature sensor can only detect the temperature rise rate of temperature；The function of temperature sensor It can also can detect temperature and detect the temperature rise rate of temperature.As long as and temperature or the one of temperature of temperature rise rate pass When the temperature that sensor detects meets safe preset condition, circulating cooling system begins to run, and works as all temperature sensing When the temperature that device detects is lower than preset value, the third valve being correspondingly arranged is closed.But as long as one of activated coke absorption is anti- Device is answered to be in circulating cooling, then heat exchanger 10 is constantly in working condition.
In embodiment five, as shown in Figure 1, on the basis of embodiment one, two, three or four, when activated coke activity focus layer Temperature be lower than preset value, and after all activated cokes complete absorption regeneration circulation, heat exchanger is closed, and heat-exchange gas stops It circulates in heat exchanger and activated coke adsorption reaction system；Former flue gas enters activated coke adsorption reaction system and is purified afterwards.
In the present embodiment, when activated coke adsorption reaction system includes at least one activated coke adsorption reaction device, flexibility Greatly, each activated coke adsorption reaction device is equipped with corresponding circulation line, and when as circulating cooling system, a certain activated coke is inhaled When reaction enclosure device occurs abnormal, corresponding pipe valve is opened, other activated coke adsorption reaction devices are not influenced； When carrying out repair and maintenance as ventilatory, it can integrally overhaul, actual conditions separate unit purification device repair and maintenance can also be combined. With strong points and flexibility is big, ensure that the working efficiency of system, and heat-exchange gas circulation system is simple, and control is held Easily, easy to maintain.
Illustratively, as shown in Figure 1, when three 5-3 of activated coke adsorption reaction device any active focus layer (or active focus layer Any test point, that is, be equipped with the position of temperature sensor) temperature when meeting safe preset condition, three 3-3 of the first valve is closed It closes, so that former flue gas stopping flows to the activated coke adsorption reaction device；Second valve, three 4-3 is opened, and rear heat-exchange gas flows through It is discharged after the activated coke adsorption reaction device；Going out after former flue gas is cleaned for the activated coke adsorption reaction device is formed by tail afterwards When the inside oxygen content of the outlet flue of gas is lower than 3%, three 4-3 of the second valve is closed, three 8-3 of the 4th valve is closed, third valve Three 7-3 of door are opened, and heat-exchange gas is in heat exchanger and the activated coke adsorption reaction device circulation, so that through active focus layer liter Heat-exchange gas after temperature flows to the activated coke adsorption reaction device after heat exchanger is cooling again；Afterwards when temperature sensor detects Temperature be lower than preset value, after all activated cokes of three 5-3 of activated coke adsorption reaction device complete an absorption regeneration circulation, third Three 7-3 of valve is closed, and three 4-3 of the second valve is closed, and heat-exchange gas stops at heat exchanger and activated coke adsorption reaction device Three 5-3 circulation；Three 3-3 of the first valve is opened afterwards, and three 8-3 of the 4th valve is opened, and former flue gas enters activated coke adsorption reaction device Three 5-3 are purified.
In embodiment six, a kind of temperature-reduction protective being applicable in activated coke dry method, comprising steps of
When the temperature of the active focus layer of activated coke adsorption reaction internal system meets safe preset condition, former flue gas stops Activated coke adsorption reaction system is flowed to, rear heat-exchange gas is discharged after flowing through activated coke adsorption reaction system；Go out former flue gas quilt afterwards When being formed by the inside oxygen content of the outlet flue of tail gas after purification lower than 3%, the supply for providing heat-exchange gas is filled Closing is set, heat-exchange gas circulates in heat exchanger and activated coke adsorption reaction system circulation, so that after the heating of active focus layer Heat-exchange gas flows to activated coke adsorption reaction system after heat exchanger is cooling again；Afterwards when the temperature of active focus layer is lower than default Value, heat exchanger are closed.
In the present embodiment, this method is safely and effectively and reliable, operational excellence and easy to operate and realize；Cooled down by gas Safeguard measure accelerates the speed that gas takes away heat, reduces the dosage of protection gas, as early as possible the normal operation of recovery system, reduces Operating cost, and reduce the idleness of system；Inhibit burning (need to only stop being passed through for former flue gas) without system shutdown, without hardened Phenomenon ensure that the working efficiency and operation stability of system；Nitrogen circulation utilizes, and reduces energy consumption, saves operating cost.It is more excellent , it is discharged in entire circulating cooling process without activated coke, it is easy to operate, simplify existing cumbersome discharging operations (existing skill Art needs to be discharged activated coke, and the activated coke of discharger needs additional place to stack, and system needs for activated coke to be added to after restoring It is cumbersome in system), to save system operation cost, and reduce the idleness of system.
In embodiment seven, on the basis of embodiment six, a kind of temperature-reduction protective being applicable in activated coke dry method, safety Preset condition is that the temperature rise rate of 20~30 DEG C of temperature and/or active focus layer that the temperature of active focus layer is greater than former flue gas is greater than 0.2℃/min.In practical applications, when the temperature of temperature sensor detection is higher than former 20~30 DEG C of flue-gas temperature, while to activity Coke carries out circulating cooling.It is worth noting that since the temperature of different types of former flue gas is different, temperature sensor inspection As long as the temperature of survey is higher by 20~30 DEG C of former flue-gas temperature and just carries out circulating cooling.It specifically, can be to variety classes original flue gas Temperature sensor set temperature preset value, the preset value are higher by the arbitrary value in 20~30 DEG C of former flue-gas temperature, certainly, preset value Minimum be also higher than 10 DEG C than former flue gas, and the peak of preset value is also higher than 50 DEG C, or even 50 DEG C of ratio than former flue gas It is also high.Preferably, preset value is equal to the temperature of former flue gas.Certainly, preset value can also a little higher than former flue gas temperature (such as plateau cigarette 0~5 DEG C of temperature degree), preset value can also be slightly less than the temperature (such as low former 0~10 DEG C of flue-gas temperature) of former flue gas.Preferably, temperature It sensor settable one, may also set up multiple.And since in practical application, activated coke adsorption reaction system is to for SO2It is mixed At least one layer active focus layer can be respectively set in conjunction gas, NOx, and therefore, at least one temperature sensing is arranged in each active focus layer Device, when temperature sensor is multiple, multiple temperature sensors can arrange different location, thus increase the temperature of active focus layer Control.It is worth noting that the function of temperature sensor can only detect temperature；The function of temperature sensor can only be examined The temperature rise rate of testing temperature；The function of temperature sensor can also can detect temperature and detect the temperature rise rate of temperature.
In embodiment eight, on the basis of embodiment six or seven, a kind of temperature-reduction protective being applicable in activated coke dry method, When the stopping of former flue gas flows to activated coke adsorption reaction system, feedway is closed, and activated coke adsorption reaction system is closed, air stream Be discharged after to activated coke adsorption reaction system, after when active focus layer temperature lower than 35 DEG C and it is rear go out original flue gas be cleaned rear institute When the inside oxygen content of the outlet flue of the tail gas of formation is higher than 20%, activated coke adsorption reaction system enters inspecting state.
In the present embodiment, when activated coke adsorption reaction system needs to overhaul, then halt system stoppage in transit is needed to handle, but work Enter in activated coke adsorption system as personnel and need to meet some requirements just enter when overhauling, otherwise the sulphur in system Acid, ammonia, anaerobic environment etc. can have an adverse effect to staff.The gas in system is driven away by air and makes system Interior oxygen content is suitable with the amount of oxidation in air, and is lower than certain temperature, ensures that the personal safety of staff simultaneously Ensure that staff overhauls in time, shorten repair process and time, reduces system idleness.
In embodiment nine, on the basis of embodiment six, seven or eight, a kind of cooling protection side being applicable in activated coke dry method When the temperature of method, the active focus layer of any (one or more) activated coke adsorption reaction device meets safe preset condition, It is closed with the first valve that the activated coke adsorption reaction device is correspondingly arranged, so that former flue gas stopping flows to activated coke absorption instead Answer device；Heat-exchange gas is discharged after flowing through the activated coke adsorption reaction device afterwards；Afterwards the activated coke adsorption reaction device go out Former flue gas is formed by the inside oxygen content of the outlet flue of tail gas lower than 3% after being cleaned when, with the activated coke adsorption reaction The second valve that device is correspondingly arranged is closed, heat-exchange gas in heat exchanger and the activated coke adsorption reaction device circulation, So that the heat-exchange gas after the heating of active focus layer flows to the activated coke adsorption reaction device after heat exchanger is cooling again；Afterwards when The temperature that temperature sensor detects is lower than preset value, the third valve being set between activated coke adsorption reaction device and heat exchanger Door is closed, wherein activated coke adsorption reaction system includes at least one activated coke adsorption reaction device；The absorption of each activated coke Reaction unit is designed with the temperature sensor for detecting active focus layer temperature, for the inlet air stack into former flue gas, and goes out The outlet flue of tail gas is formed by after former gas cleaning；The outlet flue of each activated coke adsorption reaction device is equipped with and is used for The oxygen level sensor of oxygen content in detection pipe；Each activated coke adsorption reaction device is filled with the flue gas for providing former flue gas Connection is set, and is equipped with the first valve between each activated coke adsorption reaction device and flue gas device；The absorption of each activated coke Reaction unit is connected to feeder, and the second valve is equipped between each activated coke adsorption reaction device and feeder； Each activated coke adsorption reaction device is connected to heat exchanger, and is set between each activated coke adsorption reaction device and heat exchanger There is third valve.
Preferably, the outlet flue of each activated coke adsorption reaction device be equipped with the 4th valve (one 8-1 of the 4th valve, 4th valve, two 8-2, three 8-3 of the 4th valve, four 8-4...... of the 4th valve).Preferably, oxygen level sensor is set to each Between a activated coke adsorption reaction device and the third valve being correspondingly arranged with activated coke adsorption reaction device.Preferably, Two valves are set between each activated coke adsorbent equipment and the first valve being correspondingly arranged with activated coke adsorption reaction device.
Specifically, along the circulating direction of former flue gas, the front end of each activated coke adsorption reaction device is equipped with one and is used for Into the first branch pipe of former flue gas, when activated coke adsorption reaction device is several, multiple activated coke adsorption reaction device correspondences are set It is connected to after the first branch pipe set is in parallel with former flue gas air inlet main chimney flue 1, and each first branch pipe is equipped with first valve； The rear end of each activated coke adsorption reaction device is equipped with one for going out the second branch pipe of tail gas, when activated coke adsorption reaction device When being several, it is connected to after the second branch pipe that multiple activated coke adsorption reaction devices are correspondingly arranged is in parallel with tail gas outlet main chimney flue 9, And each second branch pipe is equipped with the 4th valve；The front end of each activated coke adsorption reaction device be equipped with one for into The third branch pipe of heat-exchange gas, when activated coke adsorption reaction device is several, multiple activated coke adsorption reaction devices are corresponding It is connected to after the third branch pipe of setting is in parallel with heat-exchange gas inlet manifold, and each third air intake branch is equipped with one the Two valves；The rear end of each activated coke adsorption reaction device is equipped with one for going out the 4th branch pipe of heat-exchange gas, works as activity When burnt adsorption reaction device is several, after the 4th branch pipe that multiple activated coke adsorption reaction devices are correspondingly arranged is in parallel with heat exchange Gas inlet general pipeline connection, and each 4th branch pipe is equipped with a third valve.Preferably, the first branch pipe and third branch pipe It is connected to after parallel connection with inlet air stack, so that heat-exchange gas is as the flow direction of former flue gas perpendicular to the defeated of activated coke Route is sent to flow to activated coke, the i.e. flow route one of heat-exchange gas and former flue gas in activated coke adsorption reaction device (or system) Sample.It is connected to after second branch pipe and the 4th branch pipe are in parallel with outlet flue, is connected to after the second branch pipe is in parallel with exhaust emissions pipeline.It is more It is connected to after a third branch pipe is in parallel with heat-exchange gas inlet manifold；It is connected to after multiple 4th branch pipes are in parallel with heat exchanger.It is worth Illustrate, the fluid that heat exchanger is used to cool down heat-exchange gas can be the fluid lower than former flue gas, such as air, cold air, water Deng.
Preferably, activated coke adsorption reaction device is to for SO2At least one layer of activity can be respectively set in mixed gas, NOx At least one temperature sensor is arranged in focus layer, therefore, each active focus layer, when temperature sensor is multiple, multiple temperature Sensor can arrange different location, to increase the control of the temperature of active focus layer.It is worth noting that the function of temperature sensor It can only detect temperature；The function of temperature sensor can only detect the temperature rise rate of temperature；The function of temperature sensor It can also can detect temperature and detect the temperature rise rate of temperature.As long as and temperature or the one of temperature of temperature rise rate pass When the temperature that sensor detects meets safe preset condition, circulating cooling system begins to run, and works as all temperature sensing When the temperature that device detects is lower than preset value, the third valve being correspondingly arranged is closed.But as long as one of activated coke absorption is anti- Device is answered to be in circulating cooling, then heat exchanger is constantly in working condition.
In embodiment ten, on the basis of embodiment six, seven, eight or nine, a kind of cooling guarantor being applicable in activated coke dry method Maintaining method, described when the temperature of active focus layer is lower than preset value, heat exchanger closing specifically includes step: when activated coke activity focus layer Temperature be lower than preset value, and after all activated cokes complete absorption regeneration circulation, heat exchanger is closed, and heat-exchange gas stops It circulates in heat exchanger and activated coke adsorption reaction system；Former flue gas enters activated coke adsorption reaction system and is purified afterwards.
In the present embodiment, when activated coke adsorption reaction system includes at least one activated coke adsorption reaction device, flexibility Greatly, each activated coke adsorption reaction device is equipped with corresponding circulation line, and when as circulating cooling system, a certain activated coke is inhaled When reaction enclosure device occurs abnormal, corresponding pipe valve is opened, other activated coke adsorption reaction devices are not influenced； When carrying out repair and maintenance as ventilatory, it can integrally overhaul, actual conditions separate unit purification device repair and maintenance can also be combined. With strong points and flexibility is big, ensure that the working efficiency of system, and heat-exchange gas circulation system is simple, and control is held Easily, easy to maintain.
Illustratively, as shown in Figure 1, when one 5-1 of activated coke adsorption reaction device any active focus layer (or active focus layer Any test point, that is, be equipped with the position of temperature sensor) temperature when meeting safe preset condition, one 3-1 of the first valve is closed It closes, so that former flue gas stopping flows to the activated coke adsorption reaction device；Second valve, one 4-1 is opened, and rear heat-exchange gas flows through It is discharged after the activated coke adsorption reaction device；Going out after former flue gas is cleaned for the activated coke adsorption reaction device is formed by tail afterwards When the inside oxygen content of the outlet flue of gas is lower than 3%, one 4-1 of the second valve is closed, one 8-1 of the 4th valve is closed, third valve One 7-1 of door is opened, and heat-exchange gas is in heat exchanger and the activated coke adsorption reaction device circulation, so that through active focus layer liter Heat-exchange gas after temperature flows to the activated coke adsorption reaction device after heat exchanger is cooling again；Afterwards when temperature sensor detects Temperature be lower than preset value, after all activated cokes of one 5-1 of activated coke adsorption reaction device complete an absorption regeneration circulation, third One 7-1 of valve is closed, and one 4-1 of the second valve is closed, and heat-exchange gas stops at heat exchanger and activated coke adsorption reaction device One 5-1 circulation；One 3-1 of the first valve is opened afterwards, and one 8-1 of the 4th valve is opened, and former flue gas enters activated coke adsorption reaction device One 5-1 is purified.
It is worth noting that above-described embodiment is when activated coke is in circulating cooling, then it, certainly, can be first without maintenance It is overhauled again after circulating cooling.
It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention Under, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.

Claims (10)

1. a kind of cooling protection system for being applicable in activated coke dry method characterized by comprising
For purifying the activated coke adsorption reaction system of former flue gas；
For providing the feedway of heat-exchange gas；And
Heat exchanger；
The activated coke adsorption reaction system is equipped with temperature sensor for detecting active focus layer temperature, for into former flue gas Inlet air stack, and go out after former flue gas is cleaned to be formed by the outlet flue of tail gas；
The outlet flue of the activated coke adsorption reaction system is equipped with the oxygen level sensor for oxygen content in detection pipe；
When the temperature of the activity focus layer meets safe preset condition, former flue gas stopping flows to activated coke adsorption reaction system, after Heat-exchange gas is discharged after flowing through the activated coke adsorption reaction system；Go out after former flue gas is cleaned afterwards and is formed by going out for tail gas When the inside oxygen content of gas flue is lower than 3%, the feedway is closed, and heat-exchange gas is in the heat exchanger and the activity Burnt adsorption reaction system circulation circulation, so that the heat-exchange gas after the heating of active focus layer flows again after the heat exchanger is cooling To the activated coke adsorption reaction system；Afterwards when the temperature of the active focus layer is lower than preset value, the heat exchanger is closed.
2. the cooling protection system according to claim 1 for being applicable in activated coke dry method, it is characterised in that:
The safe preset condition is that the temperature of the active focus layer is greater than 20~30 DEG C of the temperature and/or the activity of former flue gas The temperature rise rate of focus layer is greater than 0.2 DEG C/min；And/or
The preset value is equal to the temperature of former flue gas；And/or
The temperature sensor is several；And/or
Each layer of active focus layer is equipped at least one described temperature sensor.
3. the cooling protection system according to claim 1 for being applicable in activated coke dry method, which is characterized in that further include:
For providing the air source device of air to the activated coke adsorption reaction system；
When the stopping of former flue gas flows to activated coke adsorption reaction system, the feedway is closed, activated coke adsorption reaction system System is closed, and air is discharged after flowing to the activated coke adsorption reaction system, after the temperature that detects when the temperature sensor Lower than 35 DEG C and when oxygen content that the oxygen level sensor detects is higher than 20%, the activated coke adsorption reaction system enters Inspecting state.
4. the cooling protection system for being applicable in activated coke dry method according to claim 1 to 3, it is characterised in that:
The activated coke adsorption reaction system includes at least one activated coke adsorption reaction device；
Each described activated coke adsorption reaction device is designed with the temperature sensor for detecting active focus layer temperature, uses The outlet flue of tail gas is formed by the inlet air stack into former flue gas, and out after former gas cleaning；
The outlet flue of each activated coke adsorption reaction device is equipped with the oxygen content sensing for oxygen content in detection pipe Device；
Each described activated coke adsorption reaction device is connected to the flue gas device for providing former flue gas, and each described work Property coke adsorption reaction device and the flue gas device between be equipped with the first valve；
Each described activated coke adsorption reaction device is connected to the feeder, and each described activated coke adsorption reaction The second valve is equipped between device and the feeder；
Each described activated coke adsorption reaction device is connected to the heat exchanger, and each described activated coke adsorption reaction dress It sets and is equipped with third valve between the heat exchanger；
It is anti-with the activated coke absorption when temperature of the active focus layer of any activated coke adsorption reaction device meets safe preset condition The first valve for answering device to be correspondingly arranged is closed, so that former flue gas stopping flows to the activated coke adsorption reaction device；Heat exchange afterwards Gas is discharged after flowing through the activated coke adsorption reaction device；The former flue gas that goes out of the activated coke adsorption reaction device is cleaned rear institute afterwards When the inside oxygen content of the outlet flue of the tail gas of formation is lower than 3%, be correspondingly arranged with the activated coke adsorption reaction device the Two valves are closed, and heat-exchange gas is in the heat exchanger and the activated coke adsorption reaction device circulation, so that through activated coke Heat-exchange gas after layer heating flows to the activated coke adsorption reaction device after the heat exchanger is cooling again；Afterwards when the temperature The temperature that sensor detects is lower than preset value, closes with the third valve that the activated coke adsorption reaction device is correspondingly arranged.
5. the cooling protection system according to claim 4 for being applicable in activated coke dry method, it is characterised in that:
The outlet flue of each activated coke adsorption reaction device is equipped with the 4th valve；And/or
The oxygen level sensor be set to each described activated coke adsorption reaction device and with the activated coke adsorption reaction Between the third valve that device is correspondingly arranged；And/or
Second valve is set to each described activated coke adsorbent equipment and corresponding with the activated coke adsorption reaction device Between first valve being arranged.
6. a kind of temperature-reduction protective for being applicable in activated coke dry method, which is characterized in that comprising steps of
When the temperature of the active focus layer of activated coke adsorption reaction internal system meets safe preset condition, former flue gas stops flow direction The activated coke adsorption reaction system, rear heat-exchange gas are discharged after flowing through activated coke adsorption reaction system；Go out former flue gas quilt afterwards When being formed by the inside oxygen content of the outlet flue of tail gas after purification lower than 3%, the supply for providing heat-exchange gas is filled Closing is set, heat-exchange gas circulates in heat exchanger and activated coke adsorption reaction system circulation, so that after the heating of active focus layer Heat-exchange gas flows to the activated coke adsorption reaction system after heat exchanger is cooling again；Afterwards when the temperature of active focus layer is lower than pre- If value, heat exchanger is closed.
7. the temperature-reduction protective according to claim 6 for being applicable in activated coke dry method, it is characterised in that:
The safe preset condition is that the temperature of the active focus layer is greater than 20~30 DEG C of the temperature and/or the activity of former flue gas The temperature rise rate of focus layer is greater than 0.2 DEG C/min；And/or
The preset value is equal to the temperature of former flue gas；And/or
The temperature sensor is several；And/or
Each layer of active focus layer is equipped at least one described temperature sensor.
8. the temperature-reduction protective according to claim 6 for being applicable in activated coke dry method, it is characterised in that:
When the stopping of former flue gas flows to the activated coke adsorption reaction system, the feedway is closed, and the activated coke absorption is anti- Answer system to close, air is discharged after flowing to the activated coke adsorption reaction system, after be lower than when the temperature of the active focus layer 35 DEG C and it is described after go out after former flue gas is cleaned to be formed by tail gas the inside oxygen content of outlet flue when being higher than 20%, it is described Activated coke adsorption reaction system enters inspecting state.
9. the temperature-reduction protective according to claim 6 for being applicable in activated coke dry method, it is characterised in that:
It is anti-with the activated coke absorption when temperature of the active focus layer of any activated coke adsorption reaction device meets safe preset condition The first valve for answering device to be correspondingly arranged is closed, so that former flue gas stopping flows to the activated coke adsorption reaction device；Heat exchange afterwards Gas is discharged after flowing through the activated coke adsorption reaction device；The former flue gas that goes out of the activated coke adsorption reaction device is cleaned rear institute afterwards When the inside oxygen content of the outlet flue of the tail gas of formation is lower than 3%, be correspondingly arranged with the activated coke adsorption reaction device the Two valves are closed, and heat-exchange gas is in the heat exchanger and the activated coke adsorption reaction device circulation, so that through activated coke Heat-exchange gas after layer heating flows to the activated coke adsorption reaction device after the heat exchanger is cooling again；Afterwards when the temperature The temperature that sensor detects is lower than preset value, the be set between the activated coke adsorption reaction device and the heat exchanger Three valves are closed, wherein
The activated coke adsorption reaction system includes at least one activated coke adsorption reaction device；
Each described activated coke adsorption reaction device is designed with the temperature sensor for detecting active focus layer temperature, uses The outlet flue of tail gas is formed by the inlet air stack into former flue gas, and out after former gas cleaning；
The outlet flue of each activated coke adsorption reaction device is equipped with the oxygen content sensing for oxygen content in detection pipe Device；
Each described activated coke adsorption reaction device is connected to the flue gas device for providing former flue gas, and each described work Property coke adsorption reaction device and the flue gas device between be equipped with first valve；
Each described activated coke adsorption reaction device is connected to the feeder, and each described activated coke adsorption reaction Second valve is equipped between device and the feeder；
Each described activated coke adsorption reaction device is connected to the heat exchanger, and each described activated coke adsorption reaction dress It sets and is equipped with the third valve between the heat exchanger.
10. being applicable in the temperature-reduction protective of activated coke dry method according to claim 6-9 any one, which is characterized in that The temperature for working as active focus layer is lower than preset value, and heat exchanger closing specifically includes step:
It is described after the temperature of activated coke activity focus layer is lower than preset value, and all activated cokes complete an absorption regeneration circulation Heat exchanger is closed, and heat-exchange gas stops at the heat exchanger and the activated coke adsorption reaction system circulates；Former flue gas afterwards It is purified into activated coke adsorption reaction system.
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