CN107249716A - Exhaust gas treatment device and exhaust gas treatment method - Google Patents

Exhaust gas treatment device and exhaust gas treatment method Download PDF

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Publication number
CN107249716A
CN107249716A CN201680011095.4A CN201680011095A CN107249716A CN 107249716 A CN107249716 A CN 107249716A CN 201680011095 A CN201680011095 A CN 201680011095A CN 107249716 A CN107249716 A CN 107249716A
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China
Prior art keywords
activated carbon
mercury
mercury concentration
quantity delivered
exhaust
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长尾厚志
平山敦
三浦崇
臼井祐人
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JFE Steel Corp
JFE Engineering Corp
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JFE Steel Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/64—Heavy metals or compounds thereof, e.g. mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/83—Solid phase processes with moving reactants

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (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)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The problem of the present invention is to provide：Reliably absorption removes the mercury in the exhaust from stove, even if the mercury concentration in exhaust changes, and the exhaust gas treatment device and method of activated carbon can also be supplied with amounts of activated carbon adaptable therewith.Exhaust gas treatment device, the downstream position relative to the stove (1) is arranged to the dust collect plant (4) that the exhaust containing mercury from stove (1) carries out dust removal process, it is also provided with to the activated carbon feedway (3) that the exhaust flow path being vented from stove (1) guiding dust collect plant (4) is blown into activated carbon, wherein, it is provided with and determines the mercury densimeter (5) of the mercury concentration in exhaust in the downstream of dust collect plant (4), including：According to the measured value of mercury densimeter (5), so that the mercury concentration in the exhaust in the downstream of above-mentioned dust collect plant (4) is the mode below setting value, the control device (7) being controlled while activated carbon quantity delivered is maintained into defined minimum value.

Description

Exhaust gas treatment device and exhaust gas treatment method
Technical field
The present invention relates to smelt factory etc. from castoff burning facility, cement manufacturing works, thermal power plant, nonferrous metal Various factories discharge the exhaust containing mercury processing unit and exhaust gas treatment method.
Background technology
After the exhaust or mercury-containing wastes discharged from cement kiln, nonferrous metal smelting furnace are burned in incinerator Sometimes with mercury in the exhaust of discharge, if being directly released in air, then it can cause atmosphere pollution and turn into problem.Then, It is desirable to remove the mercury in exhaust.
In addition, " the Minamata treaty on mercury " was passed through in 2013, worldwide mercury management reinforcing action is entered OK.After the treaty valid, discharge limitation object facility for mercury and suppress the countermeasure of mercury discharge in research.Discharge and limit as mercury Object facility processed, can enumerate coal thermal power plant, coal fired boiler, nonferrous metal smelting facility, castoff burning facility, cement system Make facility.In such a case, to effectively removing the demand day from the processing method of the mercury in the exhaust of these facilities discharge Benefit is surging.
For example, as the general removing method from the mercury in the exhaust of incinerator or boiler furnace discharge, special Known following methods in sharp document 1,2：The bag collector or electric that dedusting is carried out to the dust in exhaust is oriented to that will be vented In the pipeline of dust arrester, relative to the activated carbon that bag collector etc. is blown into granular in upstream side position, mercury is set to be adsorbed in this Activated carbon, reinstates bag collector etc. with dust one by the activated carbon for having adsorbed mercury and carries out dust, so as to be removed from exhaust.
Following methods are used in addition, also having：Prepare pre- in the calcium hydroxide that the sour gas in being vented is removed for neutralizing The mixed powder of activated carbon is first mixed with, the mixed powder is blown into the exhaust in pipeline in the upstream side of bag collector, will be adsorbed The activated carbon of the reaction product and mercury of sour gas and calcium hydroxide reinstates bag collector etc. with dust one and carries out dust, So as to handle.In this way, after the mercury in exhaust is tightly held by activated carbon, carrying out dust to remove with bag collector etc..
System is removed Patent Document 2 discloses the mercury in exhaust, wherein, in the flue of the exhaust circulation containing mercury Way sets dust arrester, and the flue in the upstream side of dust arrester sets up the activated carbon feeding device of input activated carbon, in exhaust Mercury concentration instantaneously largely puts into activated carbon when exceeding normal concentration.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2010-221085
Patent document 2：Japanese Unexamined Patent Publication 2014-213308.
The content of the invention
The invention problem to be solved
Depending on the raw material kind smelted in the discarded species or cement kiln of burning disposal in incinerator, nonferrous metal smelting furnace Class, produces the mercury concentration temporarily elevated variation in exhaust sometimes.In this case, in order to maintain from chimney discharge row Low mercury concentration in gas, it is necessary to be always blown into the quantity delivered for the activated carbon being blown into pipeline in large quantities, or, into pipeline , it is necessary to always be blown into the quantity delivered of mixed powder in large quantities during the mixed powder that supply calcium hydroxide and activated carbon are pre-mixed.
If in this way, imagination temporarily elevated mercury concentration and activated carbon or mixed powder are always supplied into pipeline in large quantities, Then in the most period in addition to the above-mentioned temporary transient period, cause oversupply activated carbon and mixed powder, The usage amount for producing activated carbon or mixed powder is huge, the problem of pump-down process expense increases, or the amount of the dust etc. of dust is huge, The problem of dust removal process expense increases.In mercury removing system in exhaust described in patent document 2, the mercury concentration only in exhaust Activated carbon is put into during more than normal concentration, to adsorb the mercury accumulated on the filter cloth in removing dust arrester, therefore can be avoided unhelpful Activated carbon use, but there is following worry：Only it is instantaneous input activated carbon, it is impossible to activated carbon is sufficiently formed on filter cloth Layer, it is impossible to which absorption removes mercury.
In view of such situation, problem of the invention is to provide exhaust gas treatment device and exhaust gas treatment method, its is reliable Ground absorption removes the mercury in exhaust, even if the mercury concentration in exhaust changes, and can also be supplied with amounts of activated carbon adaptable therewith To activated carbon.
Means for solving the problems
According to the present invention, above-mentioned problem is solved by following exhaust gas treatment devices and its method.
[exhaust gas treatment device]
Exhaust gas treatment device the first invention described as follows, the second invention and the 3rd invention in the present invention are constituted like that, any Person can solve above-mentioned problem.
The first inventions of ＜ ＞
Exhaust gas treatment device, including：To by fire grate go out containing mercury exhaust carry out dust removal process dust collect plant, and to will row The exhaust flow path that gas is oriented to dust collect plant from stove is blown into the activated carbon feedway of activated carbon, it is characterised in that including：In dust The downstream of device determines the downstream mercury densimeter of the mercury concentration in exhaust, and the activated carbon of control activated carbon feedway is supplied To the control device of amount, control device control activated carbon quantity delivered so that activated carbon quantity delivered is being maintained into defined minimum While being worth the above, according to the mercury concentration measurement of downstream mercury densimeter, make in the exhaust in downstream of above-mentioned dust collect plant Mercury concentration for below setting value.
The second inventions of ＜ ＞
Exhaust gas treatment device, including：To by fire grate go out containing mercury exhaust carry out dust removal process dust collect plant, and to will row The exhaust flow path that gas is oriented to dust collect plant from stove is blown into the activated carbon feedway of activated carbon, it is characterised in that including：In stove Downstream and the upstream side mercury densimeter of the mercury concentration in the measure exhaust of the upstream side of dust collect plant, and control activated carbon supply dress The control device for the activated carbon quantity delivered put, control device control activated carbon quantity delivered so that maintained by activated carbon quantity delivered While more than defined minimum value, according to the mercury concentration measurement of upstream side mercury densimeter, make under above-mentioned dust collect plant The mercury concentration in the exhaust of side is swum for below setting value.
The invention ＞ of ＜ the 3rd
Exhaust gas treatment device, including：To by fire grate go out containing mercury exhaust carry out dust removal process dust collect plant, and to will row The exhaust flow path that gas is oriented to dust collect plant from stove is blown into the activated carbon feedway of activated carbon, it is characterised in that including：In stove The upstream side mercury densimeter of downstream and the mercury concentration in the measure exhaust of the upstream side of dust collect plant, the downstream in dust collect plant The control for determining the downstream mercury densimeter of the mercury concentration in exhaust and the activated carbon quantity delivered of control activated carbon feedway is filled Put, control device control activated carbon quantity delivered so that while as defined in maintaining activated carbon quantity delivered more than minimum value, According to the mercury concentration measurement of upstream side mercury densimeter and the mercury concentration measurement of downstream mercury densimeter, make above-mentioned dust collect plant Downstream exhaust in mercury concentration for below setting value.
In first to the 3rd invention, control device is preferably in the mercury concentration of upstream side mercury densimeter or downstream mercury densimeter When measured value is more than regulation mercury concentration, the mode that activated carbon quantity delivered is remained into defined maximum is controlled. Although as the mercury concentration of time average and it is less high mercury concentration temporarily drastically raise when, if according to the Gao Gongnong The substantial amounts of activated carbon of degree supply, then cause glut activated carbon in the time behind.Such excessive supply can pass through It is above-mentioned to be controlled to prevent in the way of maximum as defined in activated carbon quantity delivered is remained.
In addition, in the first invention, control device can be in the downstream of the dust collect plant based on downstream mercury densimeter Mercury concentration measurement in exhaust is advance relative to the ratio of the mercury concentration set point in the exhaust in the downstream of dust collect plant When more than the ratio of determination, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned true in advance Fixed ratio is defined in the range of 0.4 ~ 0.8.By doing so it is possible, scope of the above-mentioned predetermined ratio 0.4 ~ 0.8 Interior, the opportunity that activated carbon quantity delivered is remained into defined maximum is determined.The reasons why so determining is because of above-mentioned pre- The ratio first determined caused supply to exceed necessary big carbon content active, due to activated carbon is excessively used at generation than 0.4 hour The problem of reason cost increases, in addition, when above-mentioned predetermined ratio is bigger than 0.8, activated carbon quantity delivered is not enough, it is impossible to fully Absorption removes mercury, the problem of generation can not reduce to mercury concentration below mercury concentration set point.
In addition, in the second invention, control device can be in the upstream side of the dust collect plant based on upstream side mercury densimeter Mercury concentration measurement in exhaust is advance relative to the ratio of the mercury concentration set point in the exhaust in the downstream of dust collect plant When more than the ratio of determination, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned true in advance Fixed ratio is defined in the range of 20 ~ 200.By doing so it is possible, above-mentioned predetermined ratio is in the range of 20 ~ 200, The opportunity that activated carbon quantity delivered is remained into defined maximum is determined.The reasons why so determining is because of above-mentioned advance The ratio of determination caused supply to exceed necessary substantial amounts of activated carbon, due to activated carbon is excessively used at generation than 20 hours The problem of reason cost increases, in addition, when above-mentioned predetermined ratio is bigger than 200, activated carbon quantity delivered is not enough, it is impossible to fully Absorption removes mercury, the problem of generation can not reduce to mercury concentration below mercury concentration set point.
In addition, in the 3rd invention, control device can be in the downstream of the dust collect plant based on downstream mercury densimeter Mercury concentration measurement in exhaust is dense relative to the downstream mercury of the mercury concentration set point in the exhaust in the downstream of dust collect plant Spend ratio be predetermined ratio more than when, or the dust collect plant based on upstream side mercury densimeter upstream side exhaust in Mercury concentration measurement is relative to the upstream side mercury concentration rate of the mercury concentration set point in the exhaust in the downstream of dust collect plant When more than predetermined ratio, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned pre- The downstream mercury concentration rate first determined is defined in the range of 0.4 ~ 0.8, above-mentioned predetermined upstream side mercury concentration ratio Rate is defined in the range of 20 ~ 200.By doing so it is possible, first, above-mentioned predetermined downstream mercury ratio is 0.4 ~ 0.8 In the range of, the opportunity that activated carbon quantity delivered is remained into defined maximum is determined.So determine the reasons why be because, Above-mentioned predetermined downstream mercury concentration rate caused supply to exceed necessary substantial amounts of activated carbon, due to mistake than 0.4 hour Amount produces the problem of processing cost increases using activated carbon, in addition, in above-mentioned predetermined downstream mercury concentration rate ratio 0.8 it is big when, activated carbon quantity delivered is not enough, it is impossible to which fully absorption removes mercury, and generation can not reduce to mercury concentration the setting of mercury concentration The problem of value is following.In addition, second, above-mentioned predetermined upstream side mercury concentration rate is in the range of 20 ~ 200, by activity The opportunity that charcoal quantity delivered remains defined maximum is determined.The reasons why so determining is because of above-mentioned predetermined Upstream side mercury concentration rate caused supply to exceed necessary substantial amounts of activated carbon than 20 hours, due to being excessively used activated carbon Processing cost is produced the problem of increase, in addition, when above-mentioned predetermined upstream side mercury concentration rate is bigger than 200, activated carbon Quantity delivered is not enough, it is impossible to which fully absorption removes mercury, the problem of generation can not reduce to mercury concentration below mercury concentration set point.
In addition, in the first to the 3rd invention, control device will can blow as the activated carbon relative to processing extraction flow The defined minimum value for entering the activated carbon quantity delivered that weight is determined is set as 10 ~ 200mg/Nm3It is controlled.So make activity The defined minimum value of charcoal quantity delivered is in 10 ~ 200mg/Nm3Scope, the mercury concentration in exhaust is set as in the scope when low The value of low scope, is set as the value of high scope when mercury concentration is high.When mercury concentration ratio setting in exhaust is low, by work Property charcoal quantity delivered remains defined minimum value, so as in the bag collector of dust collect plant, always be formed with activated carbon Adsorption layer, therefore, when discharge contains the exhaust than the mercury of above-mentioned setting high concentration, due to preformed above-mentioned adsorption layer Absorption removing effect and the absorption removing of the activated carbon that is now blown into effect, also can rapidly and reliably adsorb removing mercury, make The mercury concentration of exhaust after dust is substantially low concentration.If minimum value is less than 10mg/Nm as defined in above-mentioned3, then filled in dust It is difficult to the adsorption layer for being sufficiently formed activated carbon in the bag collector put, so it is improper, if minimum value as defined in above-mentioned is more than 200mg/Nm3, then activated carbon quantity delivered become excessive, cost increases, so uneconomical.
In addition, in the first to the 3rd invention, control device will can blow as the activated carbon relative to processing extraction flow The defined maximum for entering the activated carbon quantity delivered that weight is determined is set as 300 ~ 1000mg/Nm3It is controlled.So make work The setting maximum of property charcoal quantity delivered is in 300 ~ 1000mg/Nm3Scope, the mercury concentration in exhaust is set as the scope when low In low scope value, be set as the value of high scope when mercury concentration is high.If above-mentioned setting maximum is less than 300mg/Nm3, Then generation activated carbon can not adsorb the bad of the mercury in removing exhaust sometimes, so it is improper, if above-mentioned setting maximum is more than 1000mg/Nm3, then activated carbon quantity delivered become excessive, cost increases, so uneconomical.
In addition, in the first to the 3rd invention, the increase on activated carbon quantity delivered from minimum value to maximum, control device Mercury concentration measurement that can be in exhaust from zero or less than can determination limit minimum value value to the first regulation mercury concentration model Enclose, activated carbon is supplied on the basis of the activated carbon quantity delivered of defined minimum value, above-mentioned first is reached in mercury concentration measurement Provide after mercury concentration, with the increase of mercury concentration measurement, activated carbon quantity delivered is linearly increased from defined minimum value, When mercury concentration measurement reaches the second regulation mercury concentration, make the quantity delivered that activated carbon quantity delivered is defined maximum, it is dense in mercury Spend after the above-mentioned second regulation mercury concentration of measured value arrival, relative to the increase of mercury concentration measurement, with its defined maximum Activated carbon quantity delivered is remained constant.
In addition, in the first to the 3rd invention, the increase on activated carbon quantity delivered from minimum value to maximum, control device Mercury concentration measurement that can also be in exhaust from zero or less than can determination limit minimum value value to the first regulation mercury concentration Scope, supplies activated carbon, in mercury concentration on the basis of using defined minimum value as the activated carbon quantity delivered of the first quantity delivered When measured value reaches above-mentioned first regulation mercury concentration, activated carbon quantity delivered is increased into defined second quantity delivered step by step, Mercury concentration measurement reaches the scope untill the second regulation mercury concentration, and activated carbon quantity delivered is remained into perseverance with the second quantity delivered It is fixed, in addition, when mercury concentration measurement reaches the second regulation mercury concentration, defined 3rd supply is increased to activated carbon quantity delivered The mode of amount, with the increase of mercury concentration measurement, repeats increase activated carbon quantity delivered, in the increase of activated carbon quantity delivered step by step To after defined maximum, relative to the increase of mercury concentration measurement, activated carbon quantity delivered is protected with its defined maximum Hold to be constant.
As noted above, the mercury concentration measurement in exhaust makes activated carbon quantity delivered increase from minimum value to maximum Greatly, so as to do not occur because of the quantity delivered governor motion of activated carbon feedway it is bad in the case of, successfully control live Property charcoal quantity delivered.
[exhaust gas treatment method]
Exhaust gas treatment method the 4th invention described as follows, the 5th invention and the 6th invention in the present invention are constituted like that, any Person can solve above-mentioned problem.
The invention ＞ of ＜ the 4th
Exhaust gas treatment method, methods described carries out dust removal process with dust collect plant to the exhaust containing mercury gone out by fire grate, by work Property charcoal from activated carbon feedway be blown into will be vented from stove be oriented to dust collect plant exhaust flow path, it is characterised in that including：In collection The downstream of dirt device determines the determination step of the mercury concentration in exhaust with downstream mercury densimeter, and controls work with control device Property charcoal feedway activated carbon quantity delivered rate-determining steps, activated carbon quantity delivered is controlled in rate-determining steps so that by activity While charcoal quantity delivered is maintained more than defined minimum value, according to the mercury concentration measurement of downstream mercury densimeter, make above-mentioned Mercury concentration in the exhaust in the downstream of dust collect plant is below setting value.
The invention ＞ of ＜ the 5th
Exhaust gas treatment method, methods described carries out dust removal process with dust collect plant to the exhaust containing mercury gone out by fire grate, by work Property charcoal from activated carbon feedway be blown into will be vented from stove be oriented to dust collect plant exhaust flow path, it is characterised in that including：In stove Downstream and dust collect plant upstream side with upstream side mercury densimeter determine exhaust in mercury concentration determination step, and with control Activated carbon quantity delivered is controlled in the rate-determining steps of the activated carbon quantity delivered of device control activated carbon feedway processed, rate-determining steps, So that while as defined in maintaining activated carbon quantity delivered more than minimum value, being surveyed according to the mercury concentration of upstream side mercury densimeter Definite value, make above-mentioned dust collect plant downstream exhaust in mercury concentration for below setting value.
The invention ＞ of ＜ the 6th
Exhaust gas treatment method, methods described carries out dust removal process with dust collect plant to the exhaust containing mercury gone out by fire grate, by work Property charcoal be blown into from activated carbon feedway from activated carbon feedway and will be vented the exhaust flow path that dust collect plant is oriented to from stove, it is special Levy and be, including：Mercury concentration in determining exhaust with upstream side mercury densimeter in the downstream of stove and the upstream side of dust collect plant While the downstream of dust collect plant with downstream mercury densimeter determine exhaust in mercury concentration determination step, and with control Activated carbon quantity delivered is controlled in the rate-determining steps of the activated carbon quantity delivered of device control activated carbon feedway, rate-determining steps, is made Obtain while as defined in maintaining activated carbon quantity delivered more than minimum value, according to the mercury concentration mensuration of upstream side mercury densimeter Value and downstream mercury densimeter mercury concentration measurement, make above-mentioned dust collect plant downstream exhaust in mercury concentration for setting Value is following.
In 4th to the 6th invention, rate-determining steps are preferably in the mercury concentration of upstream side mercury densimeter or downstream mercury densimeter When measured value is more than regulation mercury concentration, the mode that activated carbon quantity delivered is remained into defined maximum is controlled. Although as the mercury concentration of time average and it is less high mercury concentration temporarily drastically raise when, if according to the high mercury concentration Substantial amounts of activated carbon is supplied, then causes glut activated carbon in the time behind.Such excessive supply can be by upper State and be controlled to prevent in the way of maximum as defined in activated carbon quantity delivered is remained.
In addition, in the 4th invention, rate-determining steps can be in the downstream of the dust collect plant based on downstream mercury densimeter Mercury concentration measurement in exhaust is advance relative to the ratio of the mercury concentration set point in the exhaust in the downstream of dust collect plant When more than the ratio of determination, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned true in advance Fixed ratio is defined in the range of 0.4 ~ 0.8.By doing so it is possible, scope of the above-mentioned predetermined ratio 0.4 ~ 0.8 Interior, the opportunity that activated carbon quantity delivered is remained into defined maximum is determined.The reasons why so determining is because of above-mentioned pre- The ratio first determined caused supply to exceed necessary substantial amounts of activated carbon, and produced due to activated carbon is excessively used than 0.4 hour The problem of processing cost increases, in addition, when above-mentioned predetermined ratio is bigger than 0.8, activated carbon quantity delivered is not enough, it is impossible to fill Absorption is divided to remove mercury, the problem of generation can not reduce to mercury concentration below mercury concentration set point.
In addition, in the 5th invention, rate-determining steps can be in the upstream side of the dust collect plant based on upstream side mercury densimeter Mercury concentration measurement in exhaust is advance relative to the ratio of the mercury concentration set point in the exhaust in the downstream of dust collect plant When more than the ratio of determination, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned true in advance Fixed ratio is defined in the range of 20 ~ 200.By doing so it is possible, above-mentioned predetermined ratio is in the range of 20 ~ 200, The opportunity that activated carbon quantity delivered is remained into defined maximum is determined.The reasons why so determining is because of above-mentioned advance The ratio of determination caused supply to exceed necessary substantial amounts of activated carbon, due to activated carbon is excessively used at generation than 20 hours The problem of reason cost increases, in addition, when above-mentioned predetermined ratio is bigger than 200, activated carbon quantity delivered is not enough, it is impossible to fully Absorption removes mercury, the problem of generation can not reduce to mercury concentration below mercury concentration set point.
In addition, in the 6th invention, rate-determining steps can be in the downstream of the dust collect plant based on downstream mercury densimeter Mercury concentration measurement in exhaust is dense relative to the downstream mercury of the mercury concentration set point in the exhaust in the downstream of dust collect plant Spend ratio be predetermined ratio more than when, or the dust collect plant based on upstream side mercury densimeter upstream side exhaust in Mercury concentration measurement is relative to the upstream side mercury concentration rate of the mercury concentration set point in the exhaust in the downstream of dust collect plant When more than predetermined ratio, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned pre- The downstream mercury concentration rate first determined is defined in the range of 0.4 ~ 0.8, above-mentioned predetermined upstream side mercury concentration ratio Rate is defined in the range of 20 ~ 200.By doing so it is possible, first, above-mentioned predetermined downstream mercury ratio is 0.4 ~ 0.8 In the range of, the opportunity that activated carbon quantity delivered is remained into defined maximum is determined.So determine the reasons why be because, Above-mentioned predetermined downstream mercury concentration rate caused supply to exceed necessary substantial amounts of activated carbon, due to mistake than 0.4 hour Amount produces the problem of processing cost increases using activated carbon, in addition, in above-mentioned predetermined downstream mercury concentration rate ratio 0.8 it is big when, activated carbon quantity delivered is not enough, it is impossible to which fully absorption removes mercury, and generation can not reduce to mercury concentration the setting of mercury concentration The problem of value is following.In addition, second, above-mentioned predetermined upstream side mercury concentration rate is in the range of 20 ~ 200, by activity The opportunity that charcoal quantity delivered remains defined maximum is determined.The reasons why so determining is because of above-mentioned predetermined Upstream side mercury concentration rate caused supply to exceed necessary substantial amounts of activated carbon than 20 hours, due to being excessively used activated carbon Processing cost is produced the problem of increase, in addition, when above-mentioned predetermined upstream side mercury concentration rate is bigger than 200, activated carbon Quantity delivered is not enough, it is impossible to abundant Adsorption of Mercury, the problem of generation can not reduce to mercury concentration below mercury concentration set point.
In addition, in the 4th to the 6th invention, rate-determining steps will can blow as the activated carbon relative to processing extraction flow The defined minimum value for entering the activated carbon quantity delivered that weight is determined is set as 10 ~ 200mg/Nm3It is controlled.So make activity The defined minimum value of charcoal quantity delivered is in 10 ~ 200mg/Nm3Scope, the mercury concentration in exhaust is set as in the scope when low The value of low scope, is set as the value of high scope when mercury concentration is high.In this way, the mercury concentration ratio setting in exhaust is low When, activated carbon quantity delivered is remained into defined minimum value, so as in the bag collector of dust collect plant, always be formed with work Property charcoal adsorption layer, therefore, discharge containing the high concentration mercury higher than above-mentioned setting concentration exhaust when, due to being pre-formed Above-mentioned adsorption layer absorption removing effect and the absorption removing of the activated carbon that is now blown into effect, also can rapidly and reliably inhale Attached removing mercury, the mercury concentration for making the exhaust after dust is substantially low concentration.If minimum value is less than 10mg/Nm as defined in above-mentioned3, Then it is difficult to the adsorption layer for being sufficiently formed activated carbon in the bag collector of dust collect plant, so it is improper, if as defined in above-mentioned Minimum value is more than 200mg/Nm3, then activated carbon quantity delivered become excessive, cost increases, so uneconomical.
In addition, in the 4th to the 6th invention, rate-determining steps will can blow as the activated carbon relative to processing extraction flow The defined maximum for entering the activated carbon quantity delivered that weight is determined is set as 300 ~ 1000mg/Nm3It is controlled.So make work The setting maximum of property charcoal quantity delivered is in 300 ~ 1000mg/Nm3Scope, the mercury concentration in exhaust is set as the scope when low In low scope value, be set as the value of high scope when mercury concentration is high.If above-mentioned setting maximum is less than 300mg/Nm3, Then generation activated carbon can not adsorb the bad of the mercury in removing exhaust sometimes, so it is improper, if above-mentioned setting maximum is more than 1000mg/Nm3, then activated carbon quantity delivered become excessive, cost increases, so uneconomical.
In addition, in the 4th to the 6th invention, the increase on activated carbon quantity delivered from minimum value to maximum, rate-determining steps Mercury concentration measurement that can be in exhaust from zero or less than can determination limit minimum value value to the first regulation mercury concentration model Enclose, activated carbon is supplied on the basis of the activated carbon quantity delivered of defined minimum value, above-mentioned first is reached in mercury concentration measurement Provide after mercury concentration, with the increase of mercury concentration measurement, activated carbon quantity delivered is linearly increased from defined minimum value, When mercury concentration measurement reaches the second regulation mercury concentration, make the quantity delivered that activated carbon quantity delivered is defined maximum, it is dense in mercury Spend after the above-mentioned second regulation mercury concentration of measured value arrival, relative to the increase of mercury concentration measurement, with its defined maximum Activated carbon quantity delivered is remained constant.
In addition, in the 4th to the 6th invention, the increase on activated carbon quantity delivered from minimum value to maximum, rate-determining steps Can also exhaust mercury concentration measurement from zero or less than can determination limit minimum value value to first regulation mercury concentration model Enclose, activated carbon is supplied on the basis of using defined minimum value as the activated carbon quantity delivered of the first quantity delivered, surveyed in mercury concentration When definite value reaches above-mentioned first regulation mercury concentration, activated carbon quantity delivered is increased into defined second quantity delivered step by step, in mercury Concentration measurement reach second provide mercury concentration untill scope, activated carbon quantity delivered is remained with the second quantity delivered it is constant, In addition, when mercury concentration measurement reaches the second regulation mercury concentration, defined 3rd quantity delivered is increased to activated carbon quantity delivered Mode, with the increase of mercury concentration measurement, increase activated carbon quantity delivered is repeated step by step, is increased in activated carbon quantity delivered After defined maximum, relative to the increase of mercury concentration measurement, activated carbon quantity delivered is kept with its defined maximum To be constant.
It is as noted above, according to the mercury concentration measurement of exhaust, activated carbon quantity delivered is increased from minimum value to maximum, So as to do not occur because of the quantity delivered governor motion of activated carbon feedway it is bad in the case of, successfully control activated carbon Quantity delivered.
According to such present invention, in the first invention and the 4th invention, in the downstream of dust collect plant, mercury densimeter is used Determine based on activated carbon mercury absorption remove after exhaust in real-time mercury concentration to adjust activated carbon quantity delivered, so as to Activated carbon quantity delivered is adjusted in the case of without excessive and deficiency, it is below the setting value allowed to make the mercury concentration.
In second invention and the 5th invention, in the downstream of stove and the upstream side of dust collect plant, determined with mercury densimeter Mercury concentration, activated carbon quantity delivered is adjusted according to the measured value, so that the mercury concentration in the exhaust in the downstream of dust collect plant is appearance Perhaps below setting value.When mercury concentration in the exhaust from stove there occurs variation, determined before exhaust inflow dust collection device Mercury concentration, according to the measured value, rapidly can be adjusted to appropriate amount by activated carbon quantity delivered, can be relative to mercury concentration In the case that variation does not produce delay, the mercury concentration in reliably making the exhaust discharged from chimney is below the setting value allowed.
In addition, in the 3rd invention and the 6th invention, in the upstream side in the downstream of stove and dust collect plant mercury densimeter While determining mercury concentration, mercury concentration also is determined with mercury densimeter in the downstream of dust collect plant, according to the measured value of both Activated carbon quantity delivered is adjusted, the mercury concentration for making the downstream of dust collect plant is below the setting value allowed.According to the downstream of stove And the mercury concentration measurement of the upstream side of dust collect plant, the control of the base value of activated carbon quantity delivered is determined, in addition, according to collection The mercury concentration measurement in the downstream of dirt device, activated carbon quantity delivered relative to base value increase and decrease the mode of regulation, is mended Fill control activated carbon quantity delivered.By so doing, can more may be used in the case where the variation relative to mercury concentration does not postpone Mercury concentration in making the exhaust discharged from chimney by ground is below the setting value allowed.
In first invention and the 4th invention, the real-time mercury concentration in the downstream of dust collect plant is determined, therefore reliably Mercury concentration in making the exhaust discharged from chimney is changed for the mercury concentration below setting value, but in the exhaust from stove When, relative to the variation, the regulation of activated carbon quantity delivered is with delay.On the other hand, in the second invention and the 5th invention, The upstream side of dust collect plant determines mercury concentration, therefore also can rapidly be tackled for above-mentioned variation.In addition, the 3rd invention and In 6th invention, mercury concentration is determined in the upstream side of dust collect plant, and mercury concentration is determined in the downstream of dust collect plant, according to this Both measured value regulation activated carbon quantity delivereds, in the case of not postponing in the variation relative to mercury concentration, more Mercury concentration in reliably making the exhaust discharged from chimney is below the setting value allowed.
Invention effect
So according to the present invention, the mercury concentration in the position finding exhaust in the downstream of dust collect plant, or in dust collect plant Upstream side determine, or determined in the upstream side of dust collect plant and downstream, amounts of activated carbon maintained into defined minimum While being worth the above, the quantity delivered for the activated carbon being blown into is adjusted according to mercury concentration measurement, therefore, in the exhaust discharged from chimney Mercury concentration reliably for below setting, and no excess and it is not enough in the case of supply activated carbon, can suppress living While the usage amount of property charcoal, the attenuating of pump-down process expense is realized.
Brief description of the drawings
Fig. 1 shows first embodiment of the invention device, and (A) is its structural representation, and (B) is activated carbon feedway Structural representation.
Fig. 2 is the structural representation of second embodiment of the invention device.
Fig. 3 is the structural representation of third embodiment of the invention device.
Fig. 4 (A) ~ (H) shows the adoptable various patterns of relation as mercury concentration and activated carbon quantity delivered in exhaust.
Fig. 5 is the figure for the relation for showing the chimney mercury concentration used in embodiments of the invention and activated carbon quantity delivered.
Fig. 6 is the pass for showing the bag collector entrance mercury concentration used in embodiments of the invention and activated carbon quantity delivered The figure of system.
Embodiment
Hereinafter, embodiment of the present invention is illustrated with reference to the accompanying drawings.
In the present embodiment as shown below, as the stove of exhaust of the discharge containing mercury, with regard to the burning of burning waste Stove is illustrated, but the invention is not restricted to this, can be gone out as the various fire grates from cement kiln, nonferrous metal smelting furnace etc. The exhaust containing mercury processing unit and processing method use.
For the exhaust of the incinerator from burning waste, by the bag collector set for dust Trip position is blown into activated carbon into exhaust flow path, can suppress the mercury concentration in the downstream of bag collector in extremely low concentration water It is flat, but conventional, due to discarding the variation of species and amount, the mercury concentration in the exhaust from incinerator changes, and is Situation that defence temporarily rises in the downstream mercury concentration of bag collector is vented, it is necessary to be always blown into activated carbon in large quantities Processing cost increases.Then, in the present embodiment, mercury concentration is determined with mercury densimeter, according to the mercury concentration of measure, to exhaust It is blown into stream without excessive and not enough amounts of activated carbon.The form of the preferred METHOD FOR CONTINUOUS DETERMINATION of mercury densimeter.
The first embodiments of ＜ ＞
In Fig. 1 of the schematic structure of display the present embodiment device, the exhaust from incinerator 1 is being oriented to chimney 6 In exhaust flow path, boiler 2 and the bag collector 4 as dust collect plant are configured from upstream side, there is provided in bag collector 4 Upstream position be blown into exhaust flow path for adsorb remove exhaust in mercury activated carbon activated carbon feedway 3 and control Its control device 7 is made, is also provided with determining row in the downstream of the bag collector 4 i.e. outlet of bag collector 4 or chimney 6 The mercury densimeter 5 of mercury concentration in gas, above-mentioned mercury densimeter 5 is connected to the control device 7 so that the measure of the mercury densimeter 5 Value is sent to above-mentioned control device 7 as output signal.
In described the present embodiment device, in the exhaust in the downstream that bag collector 4 is determined with mercury densimeter 5 Mercury concentration.
The measured value of mercury densimeter 5 is sent to control device 7, the measured value and predetermined regulation mercury concentration value ratio Compared with to control activated carbon feedway 3.
When the above-mentioned regulation mercury concentration value of the mercury concentration ratio of measure is high, increase activated carbon quantity delivered.Supplied in increase activated carbon After amount, when lasting mercury concentration is the state below above-mentioned regulation mercury concentration value, entered in the way of lowering activated carbon quantity delivered Row control.
Specifically, above-mentioned activated carbon feedway 3 has：The feed hopper 3A of activated carbon is accommodated, feed hopper 3A's The distribution member 3B for the rotated versions that lower part outlet is set, and in the valve or adjustable plate 3C set further below.Described In activated carbon feedway 3, the command signal for carrying out self-control device 7, rotating speed, the valve of regulation distribution member 3B rotation are received Aperture and adjustable plate 3C aperture at least one, be supplied to adjusting the quantity delivered of activated carbon in above-mentioned exhaust flow path.
The second embodiments of ＜ ＞
The present embodiment shown in Fig. 2 is compared with the first already described embodiment, and the allocation position of only mercury densimeter 5 is different, its He is identical.Therefore, in Fig. 2, for the position common with the position of Fig. 1 the first embodiment, additional identical symbol, so that The description thereof will be omitted.
In the present embodiment, as seen in Figure 2, the mercury that mercury densimeter 5 is configured in following position findings are vented is dense Degree：The downstream of incinerator 1 and the upstream side of bag collector 4, the activated carbon of activated carbon feedway 3 are blown into the upstream of position The position of side.In the present embodiment, the mercury concentration and activity that locate is held according to the data of accumulation by control device 7 The relation of charcoal quantity delivered and the mercury concentration of the downstream position of bag collector 4.It therefore, it can determine and be blown into position in activated carbon The mercury concentration of upstream side, the mercury concentration in the downstream of bag collector 4 is estimated by the mercury concentration measurement and activated carbon quantity delivered. That is, the mercury concentration measurement of the upstream side of position is blown into according to above-mentioned activated carbon by control device 7, presumption bag collector 4 The mercury concentration in downstream, can be obtained in order that the presumption mercury concentration is the work required for below predetermined regulation mercury concentration value Property charcoal quantity delivered, so as to control the activated carbon quantity delivered of activated carbon feedway 3.As a result, making under bag collector 4 The mercury concentration of trip is below regulation mercury concentration value.
In described the present embodiment, when the mercury concentration in the exhaust from incinerator 1 changes, because mercury is dense Degree 5 activated carbon in the downstream of incinerator 1 and activated carbon feedway 3 of meter is blown into the position finding and inspection of the upstream side of position Survey the variation of the mercury concentration, it is possible to the reply of activated carbon quantity delivered is rapidly adjusted, therefore can be in no time The mercury concentration in the exhaust in chimney is securely maintained below setting value in the case of delay.In Fig. 2 illustrated example In, the mercury concentration mensuration position of mercury densimeter 5 is blown into the upstream side of position in activated carbon, but not limited to this, can also be in bag The upstream side of formula dust arrester 4 and the activated carbon are blown into the downstream of position.
The embodiment ＞ of ＜ the 3rd
The present embodiment shown in Fig. 3 is compared with the second embodiment above, except the activated carbon in activated carbon feedway 3 Outside the first mercury densimeter 5A for being blown into the configuration of the upstream side of position, it is also provided with the downstream of bag collector 4 i.e. pocket type The outlet of dust arrester 4 or chimney 6 determine the second mercury densimeter 5B of the mercury concentration in exhaust, the second mercury densimeter 5B measure Value is sent to control device 7 as output signal.It is identical with the second embodiment in addition to this point.Therefore, in Fig. 3, for The common position in the position of Fig. 2 the second embodiment, additional identical symbol, so that the description thereof will be omitted.
In the present embodiment, as shown in Figure 3, except the work of the activated carbon feedway 3 in foregoing second embodiment Property charcoal be blown into the upstream side of position configuration the first mercury densimeter 5A outside, be also provided with second in the outlet of bag collector 4 Mercury densimeter 5B.As the second embodiment, the of the upstream side of position is blown into according to the activated carbon of activated carbon feedway 3 One mercury densimeter 5A measured value controls the base value of activated carbon quantity delivered, and then the second mercury of the outlet according to bag collector 4 Densimeter 5B measured value, supplements the control of the measured value based on the first mercury densimeter 5A, so as to increase and decrease activated carbon quantity delivered Mode control.
The first mercury densimeter 5A that the upstream side of position is blown into from the activated carbon in activated carbon feedway 3 detects that mercury is dense Measured value increased phenomenon (being referred to as measured value peak) in a short time is spent, to the second mercury concentration of the outlet in bag collector 4 Meter 5B detects mercury concentration measurement peak, and therefore existence time delay, position is blown into the activated carbon of activated carbon feedway 3 The mercury concentration measurement peak of upstream side when fully calming down, may also detect mercury concentration mensuration in the outlet of bag collector 4 It is worth peak.Then, the second mercury densimeter 5B is set, controls activated carbon to supply according to the mercury concentration measurement of the outlet of bag collector 4 To amount, so that the control of the measured value based on the first mercury densimeter 5A is supplemented, can be by the mercury concentration in the exhaust in chimney more Reliably it is reduced to below setting value.
In embodiment of the present invention, control device can also be supplied according to the mercury concentration measurement and activated carbon of mercury densimeter To the predetermined corresponding relation of amount, activated carbon quantity delivered is controlled.It is used as predetermined mercury concentration measurement and activated carbon The corresponding relation of quantity delivered, can apply various schemes.
Can be the row with measure as predetermined mercury concentration measurement and the corresponding relation of activated carbon quantity delivered The increase of mercury concentration in gas, activated carbon quantity delivered is progressively increased to since defined minimum value the correspondence of defined maximum The scheme of relation.As the defined minimum value of activated carbon quantity delivered, it can also be arranged during the operating of exhaust is discharged from incinerator 1 When mercury concentration in gas is extremely low, activated carbon is always blown into the quantity delivered of the minimum value as minimum, so that it is determined that can be by Mercury concentration in exhaust in chimney securely maintains the value of the activated carbon quantity delivered below setting value.With in exhaust, mercury is dense The increase of measured value is spent, activated carbon quantity delivered is gradually increased since defined minimum value, supplied relative to mercury concentration in exhaust Activated carbon to appropriate amount.In the scheme for the corresponding relation for gradually increasing activated carbon quantity delivered since defined minimum value In, with the increase of mercury concentration, activated carbon quantity delivered can be linearly increased, multiple stages can also be divided to increase step by step, The scheme of various corresponding relations can be used.As the means of the quantity delivered of regulation activated carbon, activated carbon is adjusted alone or in combination and is supplied Aperture to the rotating speed of rotation of the rotated versions distribution member of device, the aperture of valve and adjustable plate etc., it is preferred to use with this The adjustable range of a little governor motions is mutually fitted with control characteristic (being carried out continuously or carrying out stage by stage such as the increase and decrease of quantity delivered) The scheme for the corresponding relation answered.
The example of the various schemes of mercury concentration measurement and the corresponding relation of activated carbon quantity delivered is shown in Fig. 4.
Scheme shown in Fig. 4 (A) is following scheme：The mercury concentration from exhaust measured value from zero or less than can determination limit The value of minimum value is supplied to the scope of predetermined regulation mercury concentration on the basis of the activated carbon quantity delivered of defined minimum value To activated carbon, when the measured value of mercury concentration reaches above-mentioned regulation mercury concentration, activated carbon quantity delivered is steppingly increased into rule Fixed maximum, in addition, for the increase of mercury concentration in exhaust, activated carbon quantity delivered is kept into permanent in its defined maximum It is fixed.The program is that, when the measured value of mercury concentration is lower than regulation mercury concentration, it is defined minimum value to make activated carbon quantity delivered, than When providing that mercury concentration is high, the corresponding relation for making activated carbon quantity delivered be defined maximum can use simple controlling organization control Preparing active carbon quantity delivered.
Scheme shown in Fig. 4 (B) is following scheme：In exhaust the measured value of mercury concentration from zero or less than can determination limit most The value of small value is to the first scope for providing mercury concentration, on the basis of the activated carbon quantity delivered (the first quantity delivered) of defined minimum value Upper supply activated carbon, when the measured value of mercury concentration reaches above-mentioned first regulation mercury concentration, steppingly by activated carbon quantity delivered Second quantity delivered as defined in increasing to, relative to the increase of mercury concentration in exhaust, activated carbon quantity delivered is protected with the second quantity delivered Hold to be constant, in addition, when the measured value of mercury concentration reaches second and provides mercury concentration, activated carbon quantity delivered is increased into regulation The 3rd quantity delivered mode, with the increase of mercury concentration in exhaust, increase activated carbon quantity delivered is repeated with the trickle stage, Activated carbon quantity delivered is increased to after defined maximum, relative to the increase of mercury concentration in exhaust, with its defined maximum Activated carbon quantity delivered is remained constant.With the increase of mercury concentration in exhaust, by activated carbon quantity delivered from defined minimum value Defined maximum is increased to step by step, so as to be controlled relative to mercury concentration in exhaust so that by the confession of activated carbon Give more appropriate amount supply.
Scheme shown in Fig. 4 (C) is following scheme：It is linear from defined minimum value with the increase of mercury concentration in exhaust Ground increases activated carbon quantity delivered.In addition, the case shown in Fig. 4 (D) is following scheme：The measured value of mercury concentration reaches rule in exhaust Determine the scope untill mercury concentration, with the increase of mercury concentration in exhaust, activated carbon supply is linearly increased from defined minimum value Amount, in the above-mentioned defined exhaust of measured value arrival of mercury concentration during mercury concentration, it is defined maximum to make activated carbon quantity delivered Quantity delivered, increased in activated carbon quantity delivered as defined in after maximum, relative to the increase of mercury concentration in exhaust, advised with it Fixed maximum remains activated carbon quantity delivered constant.In case shown in Fig. 4 (C), (D), with the increasing of mercury concentration in exhaust Plus, continuously increase activated carbon quantity delivered from defined minimum value, so as to relative to entering in exhaust mercury concentration very fine Row control, activated carbon is supplied with appropriate amount.
Scheme shown in Fig. 4 (E) is following scheme：In exhaust the measured value of mercury concentration from zero or less than can determination limit most The value of small value supplies activity to the scope of the first regulation mercury concentration on the basis of the activated carbon quantity delivered of defined minimum value Charcoal, after the measured value of mercury concentration reaches above-mentioned first regulation mercury concentration, with the increase of mercury concentration in exhaust, from it is defined most Small value linearly increases activated carbon quantity delivered, when the measured value of mercury concentration reaches the second regulation mercury concentration, supplies activated carbon Measure as the quantity delivered of defined maximum, increased in activated carbon quantity delivered as defined in after maximum, relative to mercury in exhaust The increase of concentration, is remained activated carbon quantity delivered with its defined maximum constant.Scheme shown in Fig. 4 (E) is to be combined with Fig. 4 (A) and the scheme shown in (C) scheme, have feature, the effect of respective scheme concurrently.
Scheme shown in Fig. 4 (F) is following scheme：In exhaust the measured value of mercury concentration from zero or less than can determination limit most The value of small value is to the first scope for providing mercury concentration, on the basis of the activated carbon quantity delivered (the first quantity delivered) of defined minimum value Upper supply activated carbon, after the measured value of mercury concentration reaches above-mentioned first regulation mercury concentration, with the increase of mercury concentration in exhaust, Activated carbon quantity delivered is linearly increased from the first quantity delivered, the second quantity delivered corresponding to the second regulation mercury concentration is increased to, this Afterwards relative to the increase of mercury concentration in exhaust, activated carbon quantity delivered is remained with the second quantity delivered it is constant, in addition, reaching the During three regulation mercury concentration, activated carbon quantity delivered is linearly increased from the second quantity delivered, is increased to corresponding to the 4th regulation mercury concentration The 3rd quantity delivered, thereafter relative to the increase of mercury concentration in exhaust, activated carbon quantity delivered is remained into perseverance with the 3rd quantity delivered It is fixed, relative to the increase of mercury concentration in such exhaust, repeat activated carbon quantity delivered remaining constant and increase, in activated carbon Quantity delivered increase to as defined in after maximum, relative to the increase of mercury concentration in exhaust, with its defined maximum by activity Charcoal quantity delivered remains constant.Scheme shown in Fig. 4 (F) is the scheme for being combined with Fig. 4 (B) and the scheme shown in (D), is had concurrently each From scheme feature, effect.
Scheme shown in Fig. 4 (G) is following scheme：Phase untill the measured value of mercury concentration reaches regulation mercury concentration in exhaust Between, with the increase of mercury concentration in exhaust, activated carbon quantity delivered is linearly increased from defined minimum value, in the measure of mercury concentration When value reaches above-mentioned regulation mercury concentration, activated carbon quantity delivered is steppingly increased into defined maximum, in activated carbon supply Amount is increased to after defined maximum, relative to the increase of mercury concentration in exhaust, is supplied activated carbon with its defined maximum Remained to amount constant.This is following corresponding relation：The measured value of the mercury concentration regulation more moderate than relatively in exhaust Value it is low when, with the increase of mercury concentration in exhaust, activated carbon quantity delivered is continuously increased from defined minimum value, so as to Relative to being controlled in exhaust, activated carbon, the measured value of mercury concentration in exhaust are supplied with appropriate amount mercury concentration very fine When the regulation mercury concentration more moderate than relatively is high, it is defined maximum to make activated carbon quantity delivered, can effectively utilize regulation Multiple means of the quantity delivered of activated carbon, activated carbon quantity delivered is controlled with appropriate amount.
Scheme shown in Fig. 4 (H) is following scheme：The first regulation mercury concentration of measured value arrival of mercury concentration is in exhaust During only, with the increase of mercury concentration in exhaust, activated carbon quantity delivered is linearly increased from defined minimum value, in mercury concentration When measured value reaches above-mentioned first regulation mercury concentration, it is defined first quantity delivered to make activated carbon quantity delivered, in the survey of mercury concentration Definite value reach second provide mercury concentration untill during, activated carbon quantity delivered is remained with defined first quantity delivered it is constant, When the measured value of mercury concentration reaches above-mentioned second regulation mercury concentration, activated carbon quantity delivered is steppingly increased into defined maximum Value, increased in activated carbon quantity delivered as defined in after maximum, relative to the increase of mercury concentration in exhaust, with as defined in it most Big value remains activated carbon quantity delivered constant.Scheme shown in Fig. 4 (H) is to be combined in the scheme shown in Fig. 4 (G) in following The scheme of appearance：In exhaust the measured value of mercury concentration for moderate defined scope relatively (from the first regulation mercury concentration to The scope of second regulation mercury concentration) in, activated carbon quantity delivered is remained with the first regulation quantity delivered constant, can be controlled System, the supply of activated carbon is supplied with more appropriate amount.
In addition, in control device according to the mercury concentration measurement for predefining mercury densimeter and the correspondence of activated carbon quantity delivered When relation controls activated carbon quantity delivered, the side of predetermined mercury concentration measurement and the corresponding relation of activated carbon quantity delivered is used as The scheme of case or following corresponding relation：Mercury concentration is zero or determining less than mercury densimeter in the exhaust of measure When limiting minimum value or be lower than predetermined setting, without the supply of activated carbon, mercury concentration ratio zero or it can be surveyed in exhaust When fixed limit minimum value or high predetermined setting, with the increase of mercury concentration in exhaust, gradually increase activated carbon quantity delivered. In addition, when the increase of mercury concentration in exhaust increases activated carbon quantity delivered, can linearly increase, can also be step by step Increase.
In addition, as the scheme beyond above-mentioned corresponding relation, can also corresponding relation as follows scheme：In the exhaust of measure Middle mercury concentration be zero or less than mercury densimeter can determination limit minimum value or it is lower than predetermined first regulation mercury concentration when, no Carry out activated carbon supply, in exhaust mercury concentration ratio zero or can determination limit minimum value or it is predetermined first regulation mercury concentration High and lower than the predetermined second regulation mercury concentration scope, with the increase of mercury concentration in exhaust, gradually increases activated carbon Quantity delivered, the measured value of the mercury concentration scope higher than the above-mentioned second regulation mercury concentration in exhaust, it is rule to make activated carbon quantity delivered Fixed quantity delivered keeps constant.In addition, when the increase of mercury concentration in exhaust increases activated carbon quantity delivered, can be linear Ground increase, can also increase step by step.
In the present invention, activity is being controlled according to the mercury concentration and the corresponding relation of activated carbon quantity delivered that predefine in being vented During charcoal quantity delivered, the increase for the activated carbon quantity delivered from its minimum value to maximum uses various schemes, and this gives in Fig. 4 To illustrate, and minimum value and defined maximum as defined in how determining, as one example, just increased using Fig. 4 (E) scheme The situation of big activated carbon quantity delivered is as described below.That is, mercury concentration measurement and the corresponding relation of activated carbon quantity delivered is as follows Scheme.The program is：In exhaust the measured value of mercury concentration from zero or less than can determination limit minimum value value to first regulation The scope of mercury concentration, supplies activated carbon, in the measured value of mercury concentration on the basis of the activated carbon quantity delivered of defined minimum value Reach after above-mentioned first regulation mercury concentration, with the increase of mercury concentration in exhaust, activity is linearly increased from defined minimum value Charcoal quantity delivered, when the measured value of mercury concentration reaches the second regulation mercury concentration, it is defined maximum to make activated carbon quantity delivered Quantity delivered, after activated carbon quantity delivered increases to defined maximum, relative to the increase of mercury concentration in exhaust, is provided with it Maximum activated carbon quantity delivered is remained it is constant.
Inventor is used to determine using the exhaust gas treatment device shown in Fig. 2 during processing to carrying out the exhaust containing mercury All conditions of minimum value and defined maximum are studied as defined in stating.In the research, measure dust collect plant entrance (on Swim side) exhaust in mercury concentration, for the mercury concentration in the exhaust in the mercury concentration measurement and the downstream of dust collect plant The situation that the ratio (upstream side mercury concentration rate) of setting value changes in the range of 20 times ~ 200 times, is simulated based on activated carbon Mercury adsorbs removing process, has obtained the defined minimum value of activated carbon quantity delivered and the proper range of defined maximum.For Above-mentioned upstream side mercury concentration rate, will divide into multiple stages between 20 times ~ 200 times, changes successively, each in each differentiation scope Appropriate scope is obtained to defined minimum value and defined maximum.The result of gained is as shown in table 1.
In table 1, such as prediction contains above-mentioned upstream side mercury concentration rate for 100 times less than 120 times of scope The exhaust of mercury from fire grate go out when, as relative to processing extraction flow activated carbon be blown into the activated carbon quantity delivered that weight is determined Defined minimum value be set as 60 ~ 200mg/Nm3, the defined maximum of activated carbon quantity delivered is set as 300 ~ 1000mg/ Nm3。
[table 1]
In the table 1, for each differentiation scope of above-mentioned upstream side mercury concentration rate, the lower limit of defined minimum value correspond to than The low situation of mercury concentration measurement or the situation higher than the mercury concentration set point in the downstream of dust collect plant in exhaust, it is defined The upper limit of minimum value corresponds to the mercury concentration in the situation higher than mercury concentration measurement in exhaust or the downstream than dust collect plant The low situation of setting value.
In addition, in table 1, for each differentiation scope of above-mentioned upstream side mercury concentration rate, the lower limit of defined maximum Corresponding to than the low situation of mercury concentration measurement or the feelings higher than the mercury concentration set point in the downstream of dust collect plant in exhaust Condition, the upper limit of defined maximum corresponds to the situation higher than mercury concentration measurement in exhaust or the downstream than dust collect plant The low situation of mercury concentration set point.
In this way, the defined minimum value of setting activated carbon quantity delivered, so that activated carbon is attached to the pocket type of dust collect plant Dust arrester to be sufficiently formed adsorption layer in advance, when discharging the exhaust of the mercury containing high concentration, can be by the work that has been formed Property charcoal adsorption layer and the activated carbon being now blown into rapidly adsorb removing mercury, and mercury concentration can be reduced to substantially low concentration.
In addition, the defined maximum of setting activated carbon quantity delivered, so as to fully adsorb the mercury for removing high concentration, And without the glut of activated carbon.
Hereinafter, it will illustrate on embodiments of the invention together with comparative example.
Embodiment
Carry out mercury to the exhaust discharged from incinerator with the exhaust gas treatment device shown in Fig. 1 ~ Fig. 3 removes place to go Reason, it is thus identified that effect.For the exhaust discharged from incinerator, the capacity from chimney is 10000Nm3/ h, chimney Mercury concentration is calculated as 50 μ g/Nm with 1 time average in interior exhaust3Below.Additionally, it is desirable to by mercury concentration measurement in the short time Maximum mercury concentration instantaneous value (being referred to as peak measured value) in the phenomenon inside sharply increased is suppressed to low.Activated carbon quantity delivered (mg/ Nm3) it is blown into weight determination as the activated carbon relative to processing extraction flow.
The peak measured value of the mercury concentration of bag collector entrance in embodiment, comparative example, the peak of the mercury concentration of chimney are surveyed Definite value is shown in table 2.
＜ comparative examples ＞
In the exhaust flow path of bag collector upstream side, with relative to capacity (Nm3/ h) it is always the quantity delivered of constant basis 50mg/Nm3Activated carbon is blown into, the mercury concentration in the exhaust of usual time chimney is 5 μ g/Nm3Below-dry.Depending on being supplied to The variation of rubbish property in incinerator, sometimes the mercury concentration of bag collector entrance change, the mercury concentration of chimney rises. Maximum 90 μ g/Nm are observed in chimney3The peak measured value of-dry mercury concentration.
The ＞ of ＜ embodiments 1
Using the exhaust gas treatment device shown in Fig. 1 in embodiment 1, the processing of the exhaust containing mercury has been carried out.It is used as dust collect plant Downstream, determine chimney exhaust in mercury concentration, utilize the chimney mercury concentration and the correspondence of activated carbon quantity delivered shown in Fig. 5 Relation obtains activated carbon quantity delivered, has supplied activated carbon.As shown in figure 5, in the μ g/Nm of chimney mercury concentration ratio 103When-dry is low, make Activated carbon quantity delivered is the constant 50mg/Nm as minimum value3, in the μ g/Nm of chimney mercury concentration ratio 103- dry height and 40 μ g/ of ratio Nm3When-dry is low, activated carbon quantity delivered is gradually increased with the increase of mercury concentration, in the μ g/Nm of chimney mercury concentration ratio 403- dry is high When, it is the constant 500mg/Nm as maximum to make activated carbon quantity delivered3。
Depending on the variation of the rubbish property supplied, the mercury concentration of bag collector entrance changes, but most In the case of height, the peak measured value of the mercury concentration of chimney is also suppressed to 70 μ g/Nm3-dry。
The ＞ of ＜ embodiments 2
Using the exhaust gas treatment device shown in Fig. 2 in embodiment 2, the processing of the exhaust containing mercury has been carried out.Determine pocket type dust Mercury concentration in the exhaust of device entrance, utilizes the bag collector entrance mercury concentration and the correspondence of activated carbon quantity delivered shown in Fig. 6 Relation obtains activated carbon quantity delivered, has supplied activated carbon.As shown in fig. 6, in the μ g/ of bag collector entrance mercury concentration ratio 100 Nm3When-dry is low, it is the constant 50mg/Nm as minimum value to make activated carbon quantity delivered3, in bag collector entrance mercury concentration Than 100 μ g/Nm3- dry height and 700 μ g/Nm of ratio3When-dry is low, activated carbon quantity delivered is gradually increased with the increase of mercury concentration, The μ g/Nm of bag collector entrance mercury concentration ratio 7003When-dry is high, make activated carbon quantity delivered to be constant as maximum 500mg/Nm3。
Depending on the variation of the rubbish property supplied, the mercury concentration of bag collector entrance changes, but most In the case of height, the peak measured value of the mercury concentration of chimney can also be suppressed to 25 μ g/Nm3-dry。
The ＞ of ＜ embodiments 3
Using the exhaust gas treatment device shown in Fig. 3 in embodiment 3, the processing of the exhaust containing mercury has been carried out.Determine pocket type dust Mercury concentration in the exhaust of device entrance determines the mercury concentration in the exhaust of chimney, utilized to control the base unit weight of activated carbon quantity delivered The corresponding relation of bag collector entrance mercury concentration and activated carbon quantity delivered shown in Fig. 6 controls the base unit weight of activated carbon quantity delivered, Using the corresponding relation supplement increase and decrease activated carbon quantity delivered of the chimney mercury concentration shown in Fig. 5 and activated carbon quantity delivered, carried out with this Control.
Depending on the variation of the rubbish property supplied, the mercury concentration of bag collector entrance changes, but most In the case of height, the peak measured value of the mercury concentration of chimney can also be suppressed to 15 μ g/Nm3-dry。
[table 2]
Unit：μg/Nm3-dry O212% scaled value
。
Description of reference numerals
1 stove (incinerator)
2 boilers
3 activated carbon feedways
4 dust collect plants (bag collector)
5 mercury densimeters
5A the first mercury densimeters
5B the second mercury densimeters
6 chimneys
7 control devices.

Claims (24)

1. exhaust gas treatment device, including：To by fire grate go out containing mercury exhaust carry out dust removal process dust collect plant, and to will It is vented the activated carbon feedway that the exhaust flow path for being oriented to dust collect plant from stove is blown into activated carbon, it is characterised in that
Including：The downstream mercury densimeter of the mercury concentration in exhaust is determined in the downstream of dust collect plant, and control activated carbon is supplied To the control device of the activated carbon quantity delivered of device,
Control device controls activated carbon quantity delivered so that more than minimum value same as defined in activated carbon quantity delivered is maintained When, according to the mercury concentration measurement of downstream mercury densimeter, make above-mentioned dust collect plant downstream exhaust in mercury concentration be Below setting value.
2. exhaust gas treatment device, including：To from fire grate go out containing mercury exhaust carry out dust removal process dust collect plant and to will It is vented the activated carbon feedway that the exhaust flow path for being oriented to dust collect plant from stove is blown into activated carbon, it is characterised in that
Including：The upstream side mercury densimeter of mercury concentration in the downstream of stove and the measure exhaust of the upstream side of dust collect plant and control The control device of the activated carbon quantity delivered of preparing active carbon feedway,
Control device controls activated carbon quantity delivered so that more than minimum value same as defined in activated carbon quantity delivered is maintained When, according to the mercury concentration measurement of upstream side mercury densimeter, make above-mentioned dust collect plant downstream exhaust in mercury concentration be Below setting value.
3. exhaust gas treatment device, including：To from fire grate go out containing mercury exhaust carry out dust removal process dust collect plant and to will It is vented the activated carbon feedway that the exhaust flow path for being oriented to dust collect plant from stove is blown into activated carbon, it is characterised in that
Including：Determined in the downstream of stove and the upstream side of dust collect plant the mercury concentration in exhaust upstream side mercury densimeter, The downstream of dust collect plant determines the downstream mercury densimeter of the mercury concentration in exhaust and the activity of control activated carbon feedway The control device of charcoal quantity delivered,
Control device controls activated carbon quantity delivered so that more than minimum value same as defined in activated carbon quantity delivered is maintained When, according to the mercury concentration measurement of upstream side mercury densimeter and the mercury concentration measurement of downstream mercury densimeter, make above-mentioned dust Mercury concentration in the exhaust in the downstream of device is below setting value.
4. the exhaust gas treatment device any one of claim 1 ~ 3, wherein, control device upstream side mercury densimeter or under When swimming the mercury concentration measurement of side mercury densimeter to be more than regulation mercury concentration, activated carbon quantity delivered is remained into defined maximum The mode of value is controlled.
5. the exhaust gas treatment device described in claim 1, wherein, control device is in the dust collect plant based on downstream mercury densimeter The mercury concentration measurement in downstream relative to the ratio of the mercury concentration set point in the exhaust in the downstream of dust collect plant be pre- When more than the ratio first determined, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, above-mentioned advance The ratio of determination is defined in the range of 0.4 ~ 0.8.
6. the exhaust gas treatment device described in claim 2, wherein, control device is in the dust collect plant based on upstream side mercury densimeter Upstream side exhaust in mercury concentration measurement relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant When ratio is more than predetermined ratio, the mode that activated carbon quantity delivered is remained into defined maximum is controlled, Above-mentioned predetermined ratio is defined in the range of 20 ~ 200.
7. the exhaust gas treatment device described in claim 3, wherein, control device is in the dust collect plant based on downstream mercury densimeter Downstream exhaust in mercury concentration measurement relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant Downstream mercury concentration rate be predetermined ratio more than when, or the dust collect plant based on upstream side mercury densimeter upstream side Exhaust in upstream side mercury of the mercury concentration measurement relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant When concentration rate is more than predetermined ratio, the mode that activated carbon quantity delivered is remained into defined maximum is controlled System, above-mentioned predetermined downstream mercury concentration rate is defined in the range of 0.4 ~ 0.8, above-mentioned predetermined upstream side Mercury concentration rate is defined in the range of 20 ~ 200.
8. the exhaust gas treatment device any one of claim 1 ~ 7, wherein, control device will be used as relative to processing exhaust The defined minimum value that the activated carbon of flow is blown into the activated carbon quantity delivered that weight is determined is set as 10 ~ 200mg/Nm3Carry out Control.
9. the exhaust gas treatment device any one of claim 4 ~ 7, wherein, control device will be used as relative to processing exhaust The defined maximum that the activated carbon of flow is blown into the activated carbon quantity delivered that weight is determined is set as 300 ~ 1000mg/Nm3Enter Row control.
10. the exhaust gas treatment device described in claim 9, wherein, control device will be used as the work relative to processing extraction flow The defined minimum value that property charcoal is blown into the activated carbon quantity delivered that weight is determined is set as 10 ~ 200mg/Nm3It is controlled.
11. the exhaust gas treatment device any one of claim 1 ~ 3, wherein, mercury concentration of the control device in exhaust is surveyed Definite value from zero or less than can determination limit minimum value value to first regulation mercury concentration scope, in the activity of defined minimum value Activated carbon is supplied on the basis of charcoal quantity delivered, after mercury concentration measurement reaches above-mentioned first regulation mercury concentration, as mercury is dense The increase of measured value is spent, activated carbon quantity delivered is linearly increased from defined minimum value, reaching second in mercury concentration measurement advises When determining mercury concentration, make the quantity delivered that activated carbon quantity delivered is defined maximum, above-mentioned second rule are reached in mercury concentration measurement Determine after mercury concentration, relative to the increase of mercury concentration measurement, activated carbon quantity delivered is remained by perseverance with its defined maximum It is fixed.
12. the exhaust gas treatment device any one of claim 1 ~ 3, wherein, mercury concentration of the control device in exhaust is surveyed Definite value from zero or less than can determination limit minimum value value to first regulation mercury concentration scope, using defined minimum value as Activated carbon is supplied on the basis of the activated carbon quantity delivered of first quantity delivered, it is dense to reach above-mentioned first regulation mercury in mercury concentration measurement When spending, activated carbon quantity delivered is increased into defined second quantity delivered step by step, reaching second in mercury concentration measurement provides mercury Scope untill concentration, activated carbon quantity delivered is remained with the second quantity delivered it is constant, in addition, reaching the in mercury concentration measurement During two regulation mercury concentration, in the way of the 3rd quantity delivered as defined in activated carbon quantity delivered is increased to, with mercury concentration measurement Increase, repeats increase activated carbon quantity delivered step by step, after activated carbon quantity delivered increases to defined maximum, relative to mercury The increase of concentration measurement, is remained activated carbon quantity delivered with its defined maximum constant.
, will 13. exhaust gas treatment method, methods described carries out dust removal process with dust collect plant to the exhaust containing mercury gone out by fire grate Activated carbon is blown into from activated carbon feedway to be vented the exhaust flow path that dust collect plant is oriented to from stove, it is characterised in that
Including：The determination step of the mercury concentration in exhaust is determined with downstream mercury densimeter in the downstream of dust collect plant, and is used The rate-determining steps of the activated carbon quantity delivered of control device control activated carbon feedway,
Activated carbon quantity delivered is controlled in rate-determining steps so that more than minimum value same as defined in activated carbon quantity delivered is maintained When, according to the mercury concentration measurement of downstream mercury densimeter, make above-mentioned dust collect plant downstream exhaust in mercury concentration be Below setting value.
, will 14. exhaust gas treatment method, methods described carries out dust removal process with dust collect plant to the exhaust containing mercury gone out by fire grate Activated carbon is blown into from activated carbon feedway to be vented the exhaust flow path that dust collect plant is oriented to from stove, it is characterised in that
Including：The survey of the mercury concentration in the measure exhaust of upstream side mercury densimeter in the downstream of stove and the upstream side of dust collect plant Determine step, and control with control device the rate-determining steps of the activated carbon quantity delivered of activated carbon feedway,
Activated carbon quantity delivered is controlled in rate-determining steps so that more than minimum value same as defined in activated carbon quantity delivered is maintained When, according to the mercury concentration measurement of upstream side mercury densimeter, make above-mentioned dust collect plant downstream exhaust in mercury concentration be Below setting value.
, will 15. exhaust gas treatment method, methods described carries out dust removal process with dust collect plant to the exhaust containing mercury gone out by fire grate Activated carbon is blown into from activated carbon feedway from activated carbon feedway to be vented the exhaust flow path that dust collect plant is oriented to from stove, its It is characterised by,
Including：The same of the mercury concentration in exhaust is determined with upstream side mercury densimeter in the downstream of stove and the upstream side of dust collect plant When the determination step of the mercury concentration in exhaust is determined with downstream mercury densimeter in the downstream of dust collect plant, and use control device The rate-determining steps of the activated carbon quantity delivered of activated carbon feedway are controlled,
Activated carbon quantity delivered is controlled in rate-determining steps so that more than minimum value same as defined in activated carbon quantity delivered is maintained When, according to the mercury concentration measurement of upstream side mercury densimeter and the mercury concentration measurement of downstream mercury densimeter, make above-mentioned dust Mercury concentration in the exhaust in the downstream of device is below setting value.
16. the exhaust gas treatment method any one of claim 13 ~ 15, wherein, rate-determining steps are in upstream side mercury densimeter Or the mercury concentration measurement of downstream mercury densimeter is when providing more than mercury concentration, activated carbon quantity delivered to be remained defined The mode of maximum is controlled.
17. the exhaust gas treatment method described in claim 13, wherein, rate-determining steps are filled in the dust based on downstream mercury densimeter Mercury concentration measurement in the exhaust in the downstream put is relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant Ratio to be more than predetermined ratio when, by activated carbon quantity delivered remain as defined in the mode of maximum controlled System, above-mentioned predetermined ratio is defined in the range of 0.4 ~ 0.8.
18. the exhaust gas treatment method described in claim 14, wherein, rate-determining steps are filled in the dust based on upstream side mercury densimeter Mercury concentration measurement in the exhaust for the upstream side put is relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant Ratio to be more than predetermined ratio when, by activated carbon quantity delivered remain as defined in the mode of maximum controlled System, above-mentioned predetermined ratio is defined in the range of 20 ~ 200.
19. the exhaust gas treatment method described in claim 15, wherein, rate-determining steps are filled in the dust based on downstream mercury densimeter Mercury concentration measurement in the exhaust in the downstream put is relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant Downstream mercury concentration rate to be more than predetermined ratio when, or the dust collect plant based on upstream side mercury densimeter upstream Upstream side of the mercury concentration measurement relative to the mercury concentration set point in the exhaust in the downstream of dust collect plant in the exhaust of side When mercury concentration rate is more than predetermined ratio, the mode that activated carbon quantity delivered is remained into defined maximum is carried out Control, above-mentioned predetermined downstream mercury concentration rate is defined in the range of 0.4 ~ 0.8, above-mentioned predetermined upstream Side mercury concentration rate is defined in the range of 20 ~ 200.
20. the exhaust gas treatment method any one of claim 13 ~ 19, wherein, rate-determining steps will be used as relative to processing The defined minimum value that the activated carbon of extraction flow is blown into the activated carbon quantity delivered that weight is determined is set as 10 ~ 200mg/Nm3 It is controlled.
21. the exhaust gas treatment method any one of claim 16 ~ 20, wherein, rate-determining steps will be used as relative to processing The defined maximum that the activated carbon of extraction flow is blown into the activated carbon quantity delivered that weight is determined is set as 300 ~ 1000mg/ Nm3It is controlled.
22. the exhaust gas treatment method described in claim 21, wherein, rate-determining steps will be used as the work relative to processing extraction flow The defined minimum value that property charcoal is blown into the activated carbon quantity delivered that weight is determined is set as 10 ~ 200mg/Nm3It is controlled.
23. the exhaust gas treatment method any one of claim 13 ~ 15, wherein, mercury concentration of the rate-determining steps in exhaust Measured value from zero or less than can determination limit minimum value value to first regulation mercury concentration scope, in the work of defined minimum value Property charcoal quantity delivered on the basis of supply activated carbon, mercury concentration measurement reach it is above-mentioned first regulation mercury concentration after, with mercury The increase of concentration measurement, activated carbon quantity delivered is linearly increased from defined minimum value, and second is reached in mercury concentration measurement When providing mercury concentration, the quantity delivered for making activated carbon quantity delivered be defined maximum reaches above-mentioned second in mercury concentration measurement Provide after mercury concentration, relative to the increase of mercury concentration measurement, remained activated carbon quantity delivered with its defined maximum It is constant.
24. the exhaust gas treatment method any one of claim 13 ~ 15, wherein, mercury concentration of the rate-determining steps in exhaust Measured value from zero or less than can determination limit minimum value value to first regulation mercury concentration scope, with defined minimum value make To supply activated carbon on the basis of the activated carbon quantity delivered of the first quantity delivered, above-mentioned first regulation mercury is reached in mercury concentration measurement During concentration, activated carbon quantity delivered is increased into defined second quantity delivered step by step, reaching second in mercury concentration measurement provides Scope untill mercury concentration, activated carbon quantity delivered is remained with the second quantity delivered it is constant, in addition, mercury concentration measurement reach During the second regulation mercury concentration, in the way of the 3rd quantity delivered as defined in activated carbon quantity delivered is increased to, with mercury concentration measurement Increase, increase activated carbon quantity delivered is repeated step by step, increased in activated carbon quantity delivered as defined in after maximum, relative to The increase of mercury concentration measurement, is remained activated carbon quantity delivered with its defined maximum constant.
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