JP6411397B2 - Filter device, incineration facility, adjustment method of filter cloth passing gas amount - Google Patents

Description

  The present invention relates to a filter device that filters and collects dust contained in a gas generated from a gas generation source, an incineration facility including the filter device, and a method for adjusting a filter cloth passing gas amount.

  The gas generated from gas generation sources such as incinerators contains solid particles called “dust” and acidic components such as hydrogen chloride and sulfur oxides. This will cause environmental pollution and other pollution. For this reason, in general incineration facilities, this gas is allowed to pass through a filter device before being released to the atmosphere to purify dust and acidic components.

  As the filter device, the gas generated from the gas generation source is transported to a dust collection chamber equipped with a filter cloth such as a bag filter and passed through the filter cloth to filter and collect the dust contained in the gas. The ones that are structured are common. In this type of filter device, an acidic agent such as slaked lime is introduced into a dust collection chamber in a gas flow and is attached to a filter cloth to neutralize acidic components (for example, the following patents) Reference 1).

JP 2001-198424 A

  That is, in the conventional filter device, the chemical is introduced into the dust collecting chamber on the gas flow generated from the gas generation source.

  However, for example, in a gas generation source such as an incinerator, the amount of gas generated (gas amount) varies depending on the amount and quality of the incineration object. When the amount of gas decreases, the ability of the drug to transport by gas becomes relatively small, and it may be difficult to allow a sufficient amount of drug to reach the filter cloth.

  The present invention has been developed in view of the above technical problem, and is a novel filter device capable of adjusting the amount of gas passed through the filter cloth, incineration equipment equipped with the filter device, and adjustment of the amount of gas passing through the filter cloth. It aims to provide a method.

  The filter device of the present invention for solving the technical problem transports a gas generated from a gas generation source into a dust collection chamber through a primary flue, and passes a filter cloth disposed in the dust collection chamber. After filtering and collecting the dust contained in the gas by the gas, and discharging to the secondary flue, and continuously or as needed, the chemical agent is introduced into the primary flue and adheres to the filter cloth A gas return pipe arranged so that one end communicates with the primary flue at a position upstream from the drug introduction port existing in the primary flue and the other end communicates with the secondary flue; A measuring instrument for measuring the amount of gas transported indoors or the amount of gas discharged into the secondary flue, a return device for forming a gas flow from the other end to the one end in the gas return pipe, and a medicine Is introduced into the primary flue by the measuring instrument. When the measured gas amount is below a certain value, a part of the gas discharged to the secondary flue is returned to the primary flue through the gas return pipe, thereby increasing the amount of gas passing through the filter cloth. A control device (hereinafter referred to as “the filter device of the present invention”).

  In the filter device of the present invention, the gas return pipe is provided with an adjustment valve for adjusting the amount of gas to be returned, and the degree of opening of the adjustment valve depends on the amount of gas measured by the measuring device. What is determined is a preferred embodiment.

  In the filter device of the present invention, a primary open / close valve is provided at a position near one end of the gas return pipe, and when the medicine is not introduced into the primary flue, the primary open / close valve is closed, When the medicine is introduced into the primary flue, the primary side on-off valve is preferably opened when the gas amount measured by the measuring device is not more than a certain value.

  In the filter device of the present invention, a secondary on-off valve is provided at a position near the other end of the gas return pipe, and when the medicine is not introduced into the primary flue, the secondary on-off valve is closed. When the drug is introduced into the primary flue and the gas amount measured by the measuring device is below a certain value, the secondary side on-off valve is preferably opened. .

  The incineration facility of the present invention for solving the technical problem is characterized in that the filter device of the present invention is provided in an incinerator as a gas generation source (hereinafter referred to as “the incineration facility of the present invention”). ).

  The method for adjusting the amount of gas passing through the filter cloth according to the present invention for solving the technical problem is such that gas generated from a gas generation source is transported into a dust collection chamber through a primary flue and arranged in the dust collection chamber. After filtering and collecting the dust contained in the gas by passing through the filter cloth, the dust is discharged into the secondary flue, and continuously or as needed, a drug is introduced into the primary flue to the filter cloth. A method for adjusting the amount of gas passing through a filter cloth in a filter device to be attached to a filter, wherein one end communicates with the primary flue at a position upstream from the drug introduction port existing in the primary flue, and the other end within the secondary flue When the gas return pipe is arranged so as to lead to the gas and the chemical is introduced into the primary flue, the amount of the gas passing through the primary flue or the secondary flue is below a certain value, the secondary flue Part of the gas discharged to the primary smoke through the gas return pipe Returned to, with it, characterized in that increasing the amount of gas passing through the filter cloth (hereinafter, referred to as "the present method".).

  ADVANTAGE OF THE INVENTION According to this invention, when carrying a chemical | medical agent into a dust collection chamber on the flow of the gas produced | generated from the gas generation source, the gas quantity passed through a filter cloth can be adjusted.

FIG. 1 is a schematic view showing the incineration facility of the present invention provided with the filter device of the present invention according to the first embodiment. FIG. 2 is a flowchart showing a processing procedure by the control device provided in the filter device of the present invention. FIG. 3 is a schematic view showing the incineration facility of the present invention provided with the filter device of the present invention according to Embodiment 2. FIG. 4 is a flowchart showing a processing procedure by the control device provided in the filter device of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

[Embodiment 1]
<Incineration equipment 10 of the present invention>
In FIG. 1, one Embodiment of this invention incineration equipment 10 provided with this invention filter apparatus 1 is shown. The incinerator 10 of the present invention according to the present embodiment cools the gas generated from the incinerator 2 as a gas generation source in the gas cooling chamber 3, and then the dust contained in the gas in the filter device 1 of the present invention. An acidic component is treated and released into the atmosphere through the chimney 4.

<Invention Filter Device 1>
In the filter device 1 of the present invention, gas generated from a gas generation source (in the incinerator 2 in the present embodiment) is transported into the dust collection chamber 12 through the primary flue 11 and is disposed in the dust collection chamber 12. By passing the filter cloth 13, the dust contained in the gas is collected by filtration.

  The filter device 1 of the present invention is provided with a medicine introduction device 14. The drug introduction device 14 includes a drug introduction pipe 141, a drug storage container 142 arranged in a pipeline of the drug introduction pipe 141, and a drug pushing fan 143 arranged at one end of the drug introduction pipe 141. It has. The multiple ends of the drug introduction pipe 141 communicate with a drug introduction port 110 existing in the primary flue 11. That is, when the medicine introduction device 14 drives the medicine pushing fan 143, the medicine contained in the medicine storage container 142 is transported through the medicine introduction pipe 141 and is passed through the medicine introduction port 110. It is designed to be introduced into the primary flue 11.

  Then, the drug introduced into the primary flue 11 reaches the filter cloth 13 along the gas flow and adheres to the surface of the filter cloth 13. Since a drug layer is formed by the drug adhering to the surface of the filter cloth 13, if the gas is passed through the filter cloth 13, the acidic component contained in the gas is neutralized. The gas treated with soot and acidic components is discharged to the secondary flue 15 and is guided to the chimney 4 by the induction fan 151 and released into the atmosphere.

  In addition, in this invention filter apparatus 1 which concerns on this embodiment, the quantity of the acidic component contained in the gas discharged | emitted by the said secondary flue 15 is detected with the detector which is not shown in figure, and the acidic component more than a regulation value is shown. When detected, a medicine is additionally introduced into the primary flue 11 or a “precoat method” is adopted in which the filter cloth 13 is backwashed by a backwash device (not shown) and then the medicine is introduced. ing. That is, the filter device 1 of the present invention adopting the precoat method introduces a drug as necessary to form a drug layer.

  The filter device 1 of the present invention further includes a gas return pipe 16, a measuring instrument 17, a return device 18, and a control device 19.

-Gas return pipe 16-
The gas return pipe 16 is arranged so that one end communicates with the primary flue 11 at a position upstream of the drug introduction port 110 existing in the primary flue 11 and the other end communicates with the secondary flue 15. Has been.

-Measuring instrument 17-
The measuring device 17 serves to measure the amount of gas discharged to the secondary flue 15. In this embodiment, a flow meter was used as the measuring device 17 and the change in the gas amount with time was measured by measuring the flow rate of the gas discharged to the secondary flue 15.

-Return device 18-
The return device 18 plays a role in forming a gas flow from the other end to the one end in the gas return pipe 16. In the present embodiment, a blower is used as the return device 18, and a gas flow is formed in the gas return pipe 16 by operating the blower.

-Control device 19-
When the medicine is introduced into the primary flue 11 and the amount of gas measured by the measuring device 17 is not more than a certain value, the control device 19 sets one of the gases discharged into the secondary flue 15. The part is returned to the primary flue 11 through the gas return pipe 16 to increase the amount of gas passing through the filter cloth 13.

  FIG. 2 shows a processing procedure of the control device 19 in the present embodiment. The control device 19 first determines the timing for introducing the medicine based on the amount of acidic components in the gas discharged to the secondary flue 15 or the differential pressure of the filter device 1 of the present invention. Specifically, when the amount of acidic components in the gas discharged to the secondary flue 15 becomes a specified value or more (S1), or when the differential pressure of the present filter device 1 becomes a specified value or more. In (S2), introduction of the drug is determined. When the amount of gas discharged to the secondary flue 15 is a predetermined value or more (S3), the filter cloth is backwashed by the backwashing device (S6), and then the introduction of the medicine is executed. (S7).

  On the other hand, when the amount of gas discharged to the secondary flue 15 is below a certain value (S3), the return device 18 is operated before introducing the chemical (S4), and the gas return pipe 16 is connected to the other. A gas flow from one end to the other is formed. When a gas flow from the other end to the one end is formed in the gas return pipe 16, the gas discharged to the secondary flue 15 is returned to the primary flue 11 through the gas return pipe 16. By returning the gas to the primary flue 11, the amount of gas introduced into the dust collection chamber 12 is increased, and the amount of gas discharged to the secondary flue 15 is also increased.

  After that, when the amount of gas discharged to the secondary flue 15 becomes a certain value or more (S5), the filter cloth is backwashed by the backwashing device (S6), and the drug is introduced. (S7). Then, after a certain time has elapsed after the introduction of the medicine (S8), the return device 18 is stopped (S9).

  In other words, the filter device 1 of the present invention is configured to adjust the amount of gas passing through the filter cloth 13 when introducing the drug into the dust collection chamber. Therefore, according to the filter device 1 of the present invention, the amount of gas introduced into the dust collection chamber 12 is increased even when the amount of gas generated depending on the amount and quality of the incineration object is below a certain value. Therefore, the amount of gas passing through the filter cloth 13 can be increased. Thereby, a sufficient amount of medicine can reach the filter cloth 13.

  By the way, in this embodiment, although the precoat system which introduce | transduces a chemical | medical agent as needed is employ | adopted about this invention filter apparatus 1, this invention filter apparatus 1 is not restricted to the thing of this system. The filter device 1 of the present invention may employ, for example, a “continuous blowing type” in which a chemical is continuously introduced while gas is generated from a gas generation source. In the case of this method, since the medicine is always introduced, the control device 19 operates the return device 18 simply when the amount of gas discharged to the secondary flue 15 becomes a predetermined value or less. Thus, a processing procedure for increasing the amount of gas passing through the filter cloth 13 is executed.

  In the present embodiment, a flow meter is used as the measuring device 17, and the change in the gas amount over time is measured by measuring the flow rate of the gas discharged to the secondary flue 15. In the measurement, the amount of gas transported into the dust collection chamber 12 may be measured. The measuring device 17 is not particularly limited as long as it can measure the amount of gas discharged to the secondary flue 15.

  In the present embodiment, a blower is used as the return device 18, but the return device 18 is not particularly limited as long as it can form a gas flow from the other end to the one end in the gas return pipe 16. It is not limited.

  In the present embodiment, when the amount of gas discharged to the secondary flue 15 becomes a predetermined value or less during the introduction of the medicine, the return device 18 is operated to allow the gas return pipe 16 to be Although a gas flow from one end to the other is formed, the amount of gas discharged into the secondary flue 15 is increased or decreased so that the amount of gas introduced into the dust collection chamber 12 increases rapidly. Accordingly, the control device 19 may execute a processing procedure for increasing or decreasing the output of the return device.

  In the filter device 1 of the present invention, the amount of gas passing through the filter cloth 13 can be automatically adjusted when the medicine is introduced into the dust collection chamber by the processing of the control device 19. In the method of the present invention, manual processing may be executed instead of the processing of the control device 19.

[Embodiment 2]
<Incineration equipment 10 of the present invention>
In FIG. 3, one Embodiment of this invention incineration equipment 10 provided with this invention filter apparatus 1 is shown. Similarly to the first embodiment, the incineration facility 10 according to the present embodiment also cools the gas generated from the incinerator 2 as a gas generation source in the gas cooling chamber 3, and then the filter device 1 according to the present invention. The dust and acid components contained in the gas are processed and released into the atmosphere through the chimney 4.

<Invention Filter Device 1>
The filter device 1 of the present invention according to this embodiment is different from the above-described embodiment in that the adjustment valve Va, the primary side on-off valve V1, and the secondary side on-off valve V2 are provided, and the processing procedure of the control device 19 is different. 1 is the same as the filter device 1 according to the present invention.

-Regulating valve Va-
The adjusting valve Va plays a role of adjusting the amount of gas returned through the gas return pipe 16. In the present embodiment, the adjusting valve Va is controlled by the control device 19, and the degree of opening is determined according to the gas amount measured by the measuring device 17.

-Primary open / close valve V1-
The primary side on-off valve V1 is provided at a position near one end of the gas return pipe 16. In the present embodiment, the primary side on-off valve V1 is controlled by the control device 19 and is closed when the medicine is not introduced into the primary flue 11, and the medicine is introduced into the primary flue 11. In doing so, it is opened when the amount of gas measured by the measuring instrument 17 is below a certain value.

-Secondary open / close valve V2-
The secondary side on-off valve V2 is provided at a position near the other end of the gas return pipe 16. In the present embodiment, the secondary side on-off valve V2 is controlled by the control device 19, and is closed when the medicine is not introduced into the primary flue 11, so that the medicine is placed in the primary flue 11. When the gas amount measured by the measuring device 17 is less than a certain value, it is opened.

-Control device 19-
FIG. 4 shows a processing procedure of the control device 19 in the present embodiment. The control device 19 first determines the timing for introducing the medicine based on the amount of acidic components in the gas discharged to the secondary flue 15 or the differential pressure of the filter device 1 of the present invention. Specifically, when the amount of acidic components in the gas discharged to the secondary flue 15 becomes a specified value or more (S101), or the differential pressure of the filter device 1 of the present invention becomes a specified value or more. In the case (S102), the introduction of the drug is determined. When the amount of gas discharged to the secondary flue 15 is equal to or greater than a certain value (S103), the backwashing device is operated (S109), and the introduction of the medicine is executed (S110).

  On the other hand, when the amount of gas discharged to the secondary flue 15 is below a certain value (S103), the return device 18 is operated before introduction of the medicine (S104), and the primary on-off valve V1 and The secondary side on-off valve V2 is opened (S105).

  The control device 19 determines the opening degree of the regulating valve Va according to the amount of gas discharged to the secondary flue 15 (S106), and opens the regulating valve Va with the decided opening degree ( S107).

  As a result, a gas flow is formed in the gas return pipe 16 from the other end to the one end. When a gas flow from the other end to the one end is formed in the gas return pipe 16, the gas discharged to the secondary flue 15 is returned to the primary flue 11 through the gas return pipe 16. By returning the gas to the primary flue 11, the amount of gas introduced into the dust collection chamber 12 is increased, and the amount of gas discharged to the secondary flue 15 is also increased.

  After that, when the amount of gas discharged to the secondary flue 15 becomes a certain value or more (S108), the backwashing device is operated (S109), and the introduction of the medicine is executed (S110). After a certain time has elapsed after the introduction of the drug (S111), the primary side on-off valve V1 and the secondary side on-off valve V2 are closed (S112), the adjustment valve Va is closed (S113), and the return device 18 is turned on. Stop (S114).

  That is, the filter device 1 of the present embodiment according to this embodiment can control the amount of gas returned to the primary flue 11 according to the degree of opening of the regulating valve Va. Thereby, the amount of gas introduced into the dust collection chamber 12 can be quickly increased.

  Further, in the filter device 1 of the present embodiment according to the present embodiment, since the primary side on-off valve V1 is closed except when the medicine is introduced, the gas flows into the gas return pipe 16 from the primary flue 11. Can be prevented.

  Furthermore, in the filter device 1 of the present embodiment according to the present embodiment, since the secondary side on-off valve V2 is closed except when the medicine is introduced, gas flows from the secondary flue 15 into the gas return pipe 16. Can be prevented.

  Since the remainder is the same as the matter described in the first embodiment, the description is omitted here to avoid repetition.

  It should be noted that the present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-mentioned embodiment is only a mere illustration in all points, and should not be interpreted limitedly. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  The present invention is suitably used as a filter device for purifying gas generated from a gas generation source.

1 Filter device of the present invention (filter device)
2 Incinerator 3 Gas cooling chamber 4 Chimney 10 The present incinerator (incinerator)
11 Primary flue 110 Drug introduction port 12 Dust collection chamber 13 Filter cloth 14 Drug introduction device 15 Secondary flue 16 Gas return pipe 17 Measuring device 18 Return device 19 Control device V1 Primary side open / close valve V2 Secondary side open / close valve Va Adjustment valve

Claims (6)

The gas generated from the gas generation source is transported into the dust collection chamber through the primary flue, and after passing through a filter cloth arranged in the dust collection chamber, the dust contained in the gas is collected by filtration, When the acid component contained in the gas discharged into the flue exceeds the specified value or when the filter cloth is backwashed, the chemical is discharged into the primary flue. A precoat filter device that is introduced into the gas flow and adheres to the filter cloth.
A gas return pipe arranged so that one end communicates with the primary flue at a position upstream from the drug introduction port existing in the primary flue and the other end communicates with the secondary flue;
A measuring device for measuring the amount of gas transported into the dust collection chamber or the amount of gas discharged into the secondary flue;
A return device for forming a gas flow from the other end to the one end in the gas return pipe;
When introducing the medicine into the primary flue, if the gas amount measured by the measuring device is below a certain value, a part of the gas discharged to the secondary flue is passed through the gas return pipe to the primary smoke. A controller for returning to the road and thereby increasing the amount of gas passing through the filter cloth;
A filter device comprising: The filter device according to claim 1,
The gas return pipe is provided with an adjustment valve for adjusting the amount of gas to be returned,
A filter device configured to determine an opening degree of the regulating valve according to an amount of gas measured by the measuring device. The filter device according to claim 1 or 2,
A primary open / close valve is provided at a position near one end of the gas return pipe;
When the drug is not introduced into the primary flue, the primary side on-off valve is closed,
When introducing the medicine into the primary flue, if the amount of gas measured by the measuring device is below a certain value, the primary side on-off valve is opened, and one of the gases discharged into the secondary flue The filter device is configured such that a portion is returned to the primary flue through the gas return pipe. The filter device according to any one of claims 1 to 3,
A secondary opening / closing valve is provided at a position near the other end of the gas return pipe,
When the drug is not introduced into the primary flue, the secondary on-off valve is closed,
When introducing the medicine into the primary flue, if the gas amount measured by the measuring device is below a certain value, the secondary side on-off valve is opened and the gas discharged into the secondary flue A filter device configured to be partially returned to the primary flue through the gas return pipe.   An incinerator comprising the filter device according to any one of claims 1 to 4 in an incinerator as a gas generation source. The gas generated from the gas generation source is transported into the dust collection chamber through the primary flue, and after passing through a filter cloth arranged in the dust collection chamber, the dust contained in the gas is collected by filtration, When the acid component contained in the gas discharged into the flue exceeds the specified value or when the filter cloth is backwashed, the chemical is discharged into the primary flue. The amount of gas passing through the filter cloth in the precoat type filter device that is introduced into the gas flow and adheres to the filter cloth,
A gas return pipe is arranged so that one end communicates with the primary flue at a position upstream from the drug introduction port existing in the primary flue, and the other end communicates with the secondary flue,
When introducing a chemical into the primary flue, if the amount of gas passing through the primary flue or the secondary flue is below a certain value, a part of the gas discharged into the secondary flue is the gas A method for adjusting the amount of gas passing through the filter cloth, wherein the amount of gas passing through the filter cloth is increased by returning to the primary flue through a return pipe.

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