JP3725013B2 - Medium regeneration tower, medium regeneration method, exhaust gas treatment device, and exhaust gas treatment method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medium regeneration tower, a medium regeneration method, an exhaust gas treatment apparatus, and an exhaust gas treatment method, and more specifically, a medium regeneration tower and a medium regeneration method for regenerating a medium that adsorbs or carries a component to be removed contained in the exhaust gas, In addition, the present invention relates to an exhaust gas treatment apparatus including the medium regeneration tower and an exhaust gas treatment method using the medium regeneration method.
[0002]
[Prior art]
Conventionally, SOx gas (SO ₂ etc.) contained in exhaust gas, HCl gas, or organic chlorine compounds such as polychlorinated dibenzoparadoxine (PCDDs), polychlorinated dibenzofuran (PCDFs), coplanar polychlorinated biphenyl (coplanar PCBs) As a device that removes components to be removed such as "dioxins", dry-type exhaust gas treatment devices that use carbonaceous adsorbents (materials) such as activated carbon, activated char, activated coke, etc., and catalysts are known. ing.
[0003]
For example, Japanese Patent Publication No. 2-60368, Japanese Patent Application Laid-Open No. 5-301022, Japanese Patent Application Laid-Open No. 11-76756, Japanese Patent Application No. 3012173 by the present applicant, etc. The apparatus and the various regeneration towers comprising it are described. These regeneration towers heat the carbonaceous adsorbent that adsorbs and holds the components to be removed by contact with the exhaust gas in the reaction tower, desorb the adsorbed and removed components from the carbonaceous adsorbent, or remove them. The carbonaceous adsorbent is regenerated by decomposing the components.
[0004]
[Problems to be solved by the invention]
By the way, the conventional regeneration tower is roughly classified into (1) one using a carrier gas and (2) one using no carrier gas. In any regeneration tower, so-called sealing gas is supplied to the carbonaceous adsorbent supply section and discharge section in the regeneration tower so that the desorbed gas generated in the regeneration tower does not flow into the reaction tower.
[0005]
FIG. 6 is a schematic sectional view showing an example of a regeneration tower using a conventional carrier gas. The regeneration tower 220 is provided with a supply part 80 and a discharge part 90 for the carbonaceous adsorbent A at the upper and lower parts of the regeneration tower body 200 having a heating part and a cooling part. A seal gas Gs is supplied to the supply unit 80 and the discharge unit 90, and the rotary valve is gas-sealed.
[0006]
Separately from this gas, the carrier gas Gk is supplied to the upper and lower portions of the main body trunk. This carrier gas Gk merges with the component to be removed (desorbed gas) desorbed when passing through the space where the heated carbonaceous adsorbent A exists, and is discharged from the regeneration tower 220. As a result, the desorbed gas is sufficiently and efficiently recovered. Therefore, such a regeneration tower 220 using the carrier gas is sufficiently satisfactory in terms of the regeneration performance of the carbonaceous adsorbent A, that is, the desorption gas discharge performance. In contrast, a regeneration tower that does not use a carrier gas has a practically sufficiently high efficiency of desorbed gas discharge due to the pressure gradient generated in the tower, but the recoverability of the desorbed gas is that using a carrier gas. This is often more advantageous.
[0007]
However, in order to further improve the overall efficiency and cost of the exhaust gas treatment process, specifically, to reduce the amount of exhaust gas generated from the regeneration tower including desorbed gas and minimize the amount of treatment, the carrier There is a need for an apparatus and method that does not use gas and therefore does not require a carrier gas supply system.
[0008]
Therefore, the present invention has been made in view of such circumstances, and without using a conventional carrier gas, it has sufficient medium regeneration performance (that is, desorbed gas discharge performance), and the regeneration tower. It is an object of the present invention to provide a medium regeneration tower, a medium regeneration method, an exhaust gas treatment apparatus, and an exhaust gas treatment method that can reduce the amount of exhaust gas from the exhaust gas and improve the efficiency and economy in exhaust gas treatment.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the medium regeneration tower according to the present invention has an adsorption capacity or resolution for a component to be removed contained in exhaust gas, and adsorbs or holds the component to be removed or a component derived from the component to be removed. (1) a medium supply unit having a rotary valve, into which the medium is introduced, and to which a first gas (preferably an inert gas) is supplied; (2) ) A main body unit arranged downstream of the medium supply unit, where the medium flows and regenerated; and (3) provided at a rear stage of the main body unit, having a rotary valve, and the regenerated medium is discharged, and And a medium discharge unit to which a second gas (preferably an inert gas) is supplied, wherein the first or second gas is represented by the following formula (1);
F1 ≧ {0.14 × D + 9.8 + (P−7.9) × 0.53} / 2 (1)
In order to satisfy the relationship expressed by the above, it is supplied to the medium supply unit and the medium discharge unit, respectively. Here, in the formula, F1 represents the flow rate (m ³ / hr) of the first gas or the second gas, D represents the inner diameter (mm) of the rotary valve, and P represents the average internal pressure (kPa) of the main body. ).
[0010]
In the medium regeneration tower configured as described above, a medium that adsorbs or holds a component to be removed or a component derived from the component to be removed is continuously supplied into the main body and discharged from the main body by continuous rotation of the rotary valve. . At this time, when the first and second gases are supplied at a flow rate satisfying the relationship represented by the expression (1), the medium supply unit and the medium discharge unit are sufficiently sealed and detached from the medium. Leakage gas is prevented from leaking out of the medium regeneration tower from the medium supply unit and the medium discharge unit. In addition, part of the first and second gases can flow into the main body, function as a carrier gas, and be discharged to the outside of the medium regeneration tower along with the desorbed gas generated inside the main body.
[0011]
Alternatively, the medium regeneration tower according to the present invention has an adsorption capacity or resolution for the components to be removed contained in the exhaust gas, and a medium in which the components to be removed or components derived from the components to be removed are adsorbed or retained is regenerated. And (1) a medium hopper having a seal hopper, into which a medium is introduced, and to which a third gas (preferably an inert gas) is supplied, and (2) at a subsequent stage of the medium supply section. A main body portion that is disposed and on which the medium flows and is regenerated; and (3) a seal hopper that is provided at the rear stage of the main body portion, the regenerated medium is discharged, and a fourth gas (preferably A medium discharge portion to which an inert gas) is supplied, and the third or fourth gas is represented by the following formula (2);
F2 ≧ {118 × V + 13 + (P−10) × 2.2} / 2 (2)
May be supplied to the medium supply unit and the medium discharge unit, respectively, so as to satisfy the relationship expressed by: Here, in the formula, F2 represents the flow rate (m ³ / hr) of the third or fourth gas, V represents the volume (m ³ ) of the seal hopper alone, and P represents the average internal pressure (kPa) of the main body. Indicates.
[0012]
In the medium regeneration tower configured as described above, the medium which adsorbs or holds the component to be removed or the component derived from the component to be removed is intermittently supplied into the main body and discharged from the main body by the intermittent operation of the seal hopper. At this time, when the third and fourth gases are supplied at a flow rate satisfying the relationship represented by Expression (2), the medium supply unit and the medium discharge unit are sufficiently sealed and detached from the medium. Leakage gas is prevented from leaking out of the medium regeneration tower from the medium supply unit and the medium discharge unit. In addition, part of the third and fourth gases can flow into the main body, function as a carrier gas, and be discharged to the outside of the medium regeneration tower along with the desorbed gas generated inside the main body.
[0013]
Further, the exhaust gas treatment method according to the present invention is a method for effectively using the medium regeneration tower of the present invention, and has an adsorption capacity or resolution for the components to be removed contained in the exhaust gas, and the components to be removed or the components to be removed. A method of regenerating a medium that adsorbs or holds a component derived from a component, having a rotary valve, into which a medium is introduced and to which a first gas is supplied, and a medium supply unit A main body portion arranged at the rear stage where the medium flows and is regenerated, and provided at a rear stage of the main body section, has a rotary valve, the regenerated medium is discharged, and the second gas is supplied. And a medium regeneration tower having a medium discharge section, wherein the first and second gases are supplied to the medium supply section and the medium discharge section, respectively, so as to satisfy the relationship represented by the above formula (1). And
[0014]
Alternatively, it is a method of regenerating a medium that has an adsorption ability or resolution for a component to be removed contained in the exhaust gas and that adsorbs or holds the component to be removed or a component derived from the component to be removed. A medium supply unit into which the medium is introduced and a third gas (preferably an inert gas) is supplied; and a body that is disposed downstream of the medium supply unit and in which the medium flows and is regenerated And a medium regeneration tower provided at a rear stage of the main body and having a seal hopper, the medium being regenerated is discharged, and the fourth gas is supplied. It is also preferable to supply the third and fourth gases to the medium supply unit and the medium discharge unit, respectively, so as to satisfy the relationship represented by (2).
[0015]
Furthermore, the exhaust gas treatment apparatus according to the present invention is suitable for use with the medium regeneration tower of the present invention, and removes the components to be removed contained in the exhaust gas. A reaction tower to which a medium having adsorption ability or resolution is supplied; and a medium regeneration tower of the present invention to which a medium in which a component to be removed or a component derived from the component to be removed is adsorbed or held in the reaction tower is supplied.
[0016]
Further, the exhaust gas treatment method according to the present invention is a method that can be effectively implemented using the exhaust gas treatment apparatus of the present invention, and is a method for removing the components to be removed contained in the exhaust gas, and for the exhaust gas and the components to be removed. A medium having an adsorbing ability or resolution is brought into contact with each other, and a medium in which a component to be removed or a component derived from the component to be removed is adsorbed or retained is reproduced by the medium reproducing method of the present invention.
[0017]
The “medium” used in the present invention refers to a material having adsorption ability or resolution with respect to the components to be removed contained in the exhaust gas, and the form is not particularly limited. For example, it is powdery or granular. A plurality of solid particles (specifically, carbonaceous adsorbent (material) particles such as activated carbon, catalyst particles, etc.) can be exemplified, and these solid particles may be aggregates or aggregates. The target or three-dimensional shape is not particularly limited, and examples thereof include a spherical shape, a cylindrical shape, and a cylindrical shape.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified.
[0019]
FIG. 1 is a configuration diagram schematically showing a preferred embodiment of an exhaust gas treatment apparatus according to the present invention. The exhaust gas treatment apparatus 100 includes a reaction tower 110 and a regeneration tower 120 (medium regeneration tower), and transfer machines 131 and 132 such as conveyors are installed between them. The transfer machines 131 and 132 are arranged so that one end of each is located below and above the reaction tower 110 and the other end is located above and below the regeneration tower 120, respectively. Yes. These transfer machines 131 and 132 are for circulating and transferring a carbonaceous adsorbent (material) described later between the reaction tower 110 and the regeneration tower 120. In addition, the reaction tower 110 and the regeneration tower 120 are supplied with a carbonaceous adsorbent from the upper end, flow down inside each, and are discharged from the lower end to the outside.
[0020]
The reaction tower 110 has an exhaust gas supply unit 18 and a processed gas discharge unit 20 on the side wall thereof. The exhaust gas W is introduced into the exhaust gas supply unit 18. While the exhaust gas W circulates across the inside of the reaction tower 110, desulfurization (adsorption of SOx gas such as SO ₂ gas), dust removal, etc. is performed with a carbonaceous adsorbent, and it has been processed as a processed gas Ws. The gas is discharged from the gas discharge unit 20 to the stack (chimney) 140 and exhausted. If reduced nitrogen such as ammonia is supplied to the reaction tower 110 together with the exhaust gas W, denitration (decomposition of NOx components) of the exhaust gas W can be performed. Further, when reduced nitrogen such as ammonia or urea is supplied to the regeneration tower 120, dioxins can be easily decomposed at a lower temperature.
[0021]
The carbonaceous adsorbent that has adsorbed the components to be removed in the exhaust gas W in the regeneration tower 120 is sent to the regeneration tower 120 by the transfer device 131, and the components to be removed such as SO ₂ gas are desorbed by heating in the regeneration tower 120. Alternatively, dioxins are decomposed. Thereby, regeneration of a carbonaceous adsorbent is performed. The gas component desorbed from the carbonaceous adsorbent is discharged from the regeneration tower 120 as an exhaust gas Gr containing a desorbed gas, and is recovered by the recovery unit 150 into an absorbent such as an alkaline agent. The absorbent that has absorbed the desorbed gas component is neutralized and oxidized, and then sent to a recovery system (not shown) using, for example, gypsum and magnesium sulfate.
[0022]
FIG. 2 is a cross-sectional view schematically showing the structure of the regeneration tower 120 in FIG. The regeneration tower 120 is a moving bed type heat exchanger in which the carbonaceous adsorbent A (medium) that has adsorbed the components to be removed in the exhaust gas W is supplied from the upper end and discharged from the lower end. The regeneration tower 120 includes a distribution unit 1, a heating unit 2, a staying unit 3, a cooling unit 4, and a stacking unit 5 each having a substantially cylindrical shape arranged in this order along a substantially vertical direction. In addition, these may be any shape of a cylindrical shape or a rectangular tube shape. Thus, the main body is composed of the distribution unit 1, the heating unit 2, the staying unit 3, the cooling unit 4, and the stacking unit 5.
[0023]
In addition, a supply unit in which a pipe 84 for supplying an inert gas G1 (first gas) is coupled between the rotary valves 81 and 82 of the pipe 83 having the rotary valves 81 and 82 is provided above the distribution unit 1. 8 (medium supply unit) is provided. Further, at the lower part of the stacking unit 5, a discharge unit in which a pipe 94 for supplying an inert gas G2 (second gas) is connected between the rotary valves 91 and 92 of the pipe 93 having the rotary valves 91 and 92. 9 (medium discharge unit) is provided.
[0024]
The distributor 1 is formed by connecting a cylindrical member below the conical member, and a distributor 11 is disposed therein. The heating unit 2 connected to the subsequent stage of the distribution unit 1 has a plurality of heating tubes 21 extending in the vertical direction. The internal space of these heating tubes 21 communicates with the internal space of the distributor 1. Further, a supply port 2a and a discharge port 2b for a heating medium Gh such as hot air (heating air) are provided at the lower and upper portions of the side wall of the heating unit 2, respectively. As a result, the heating medium Gh circulates outside the heating tube 21.
[0025]
Further, in the staying part 3 connected to the subsequent stage of the heating part 2, the heated carbonaceous adsorbent A stays, and the components to be removed adsorbed on the carbonaceous adsorbent A are desorbed and decomposed. A discharge port 3b through which the desorbed gas and the like are discharged is provided at the upper portion of the side wall of the stay portion 3.
[0026]
Furthermore, a plurality of cooling tubes 41 are arranged so as to extend vertically inside the cooling unit 4 connected to the subsequent stage of the staying unit 3. The internal spaces of these cooling tubes 41 are in communication with the internal space of the staying portion 3. Further, a supply port 4a and a discharge port 4b for a cooling medium Gc such as cold air (cooling air) and cold water are provided at the lower and upper portions of the side wall of the cooling unit 4, respectively. As a result, the cooling medium Gc flows through the outside of the cooling tube 41.
[0027]
Furthermore, the stacking unit 5 connected to the rear stage of the cooling unit 4 has a funnel-shaped (reverse cone-shaped) hopper having a roll feeder 10 rotatably installed at the lower end thereof coupled to the lower side of the cylindrical member. Further, another hopper 17 is provided below.
[0028]
In the regeneration tower 120 and the exhaust gas treatment apparatus 100 configured as described above, the carbonaceous adsorbent A transferred from the reaction tower 110 is supplied to the supply unit 8. The carbonaceous adsorbent A is continuously introduced into the distribution unit 1 through the pipe 83 by the continuous rotation of the rotary valves 82 and 81. The carbonaceous adsorbent A further flows into the heating unit 2 from the distribution unit 1 and is heated to a temperature in the range of 350 to 450 ° C., for example, by the heat of the heating medium Gh while flowing through the heating tube 21.
[0029]
The carbonaceous adsorbent A heated in this way moves to the retention part 3 and stays for a predetermined time while flowing down. During this time, the components to be removed adsorbed and held by the carbonaceous adsorbent A are desorbed, or dioxins and the like are decomposed into lower hydrocarbons and the like. Thereby, the regeneration of the carbonaceous adsorbent A is performed. The component desorbed or decomposed from the carbonaceous adsorbent A is released from the carbonaceous adsorbent A as a desorbed gas and flows to the outlet 3b side or the like due to the pressure gradient. The regenerated carbonaceous adsorbent A moves to the cooling unit 4, is cooled to a temperature within the range of 120 to 180 ° C., for example, and is collected in the accumulating unit 5. The carbonaceous adsorbent A falls into the hopper 17 by the rotation of the roll feeder 10, is discharged from the discharge section 9 through the pipe 93 by the continuous rotation of the rotary valves 91 and 92, and is returned to the reaction tower 110.
[0030]
In addition, the inert gas G1 and G2 are supplied to the supply unit 8 and the discharge unit 9 through the pipes 84 and 94, respectively. Thus, the rotary valves 81, 82, 91, 92 are effectively sealed (gas seal), and the desorbed gas generated in the main body of the regeneration tower 120 leaks from the supply section 8 and the discharge section 9 to the outside of the regeneration tower 120. Is prevented.
[0031]
Here, in the medium regeneration method and the exhaust gas treatment method according to the present invention, the supply amounts of the inert gases G1, G2 are adjusted so that the relationship represented by the following formula (1) is satisfied. F1 ≧ {0.14 × D + 9.8 + (P−7.9) × 0.53} / 2 (1)
(Where F1 represents the flow rate (m ³ / hr) of each of the inert gases G1 and G2, D represents the inner diameter (mm) of the rotary valves 81, 82, 91, and 92, and P represents the regenerator 120 (The average internal pressure (kPa) of the main body is shown.)
[0032]
3 shows the inert gas G1, G2 required for the inner diameter D of the rotary valves 81, 82, 91, 92 when the average internal pressure P of the main body of the regeneration tower 120 shown in FIG. It is a graph which shows total flow volume (F1x2), and each illustration straight line is corresponded to the lower limit of Formula (1).
[0033]
If the supply amount of the inert gas G1, G2 to the supply unit 8 and the discharge unit 9 is less than the lower limit value shown in the formula (1), the sealing of the rotary valves 81, 82, 91, 92 may not be sufficient. In this case, the desorbed gas tends to leak out of the regeneration tower 120. Further, when the supply amount of the inert gas G1, G2 is made to satisfy the formula (1), a part of the inert gas G1, G2 is maintained while the sealing performance of the rotary valves 81, 82, 91, 92 is secured. It flows into the main body of the regeneration tower 120.
[0034]
The inert gas G1 flows through the distribution unit 1 and the heating unit 2 and reaches the retention unit 3, and the inert gas G2 flows through the accumulation unit 5 and the cooling unit 4 and reaches the retention unit 3. Due to the flow of the inert gases G1 and G2, the desorbed gas generated in the stay part 3 easily flows toward the discharge port 3b, and the inert gas G1 and G2 and the outside of the regeneration tower 120 from the discharge port 3b. Is discharged. That is, the inert gases G1 and G2 that have flowed into the regeneration tower 120 from the supply unit 8 and the discharge unit 9 serve as a conventional carrier gas, and act to enhance the discharge of desorbed gas.
[0035]
Therefore, while the rotary valves 81, 82, 91, 92 are sufficiently sealed, a part of the inert gas G1, G2 functions as a carrier gas, which is superior to the desorbed gas from the carbonaceous adsorbent A. While preventing leakage, the desorbed gas discharge performance is improved and the carbonaceous adsorbent A can be sufficiently regenerated. Further, by optimizing the supply amounts of the inert gases G1 and G2 so as to satisfy the formula (1), the regeneration tower 120 is compared with the conventional case where the seal gas and the carrier gas are individually supplied to the regeneration tower. The amount of exhaust gas discharged from the can be reduced. Therefore, the efficiency of the entire processing of the exhaust gas W can be improved as the processing amount of the exhaust gas is reduced. In addition, the scale of the desorption gas processing system can be reduced, and a carrier gas supply system is not required, so that the cost of equipment or equipment can be reduced.
[0036]
FIG. 4 is a schematic cross-sectional view showing the structure of another embodiment of the medium regeneration tower according to the present invention. The regeneration tower 121 (medium regeneration tower) is configured in the same manner as the regeneration tower 120 shown in FIG. 2 except that the supply section 6 and the discharge section 7 are provided instead of the supply section 8 and the discharge section 9, respectively. is there.
[0037]
The supply unit 6 includes so-called seal hoppers 61 and 62, which are arranged so as to be isolated by the on-off valves 63 to 65, respectively. The seal hoppers 61 and 62 are connected to a pipe 67 having a switching valve 66 and supplied with an inert gas G3. Furthermore, the discharge part 7 also has seal hoppers 71 and 72, which are arranged so as to be isolated by the on-off valves 73 to 75, respectively. Further, a pipe 77 having a switching valve 76 and supplied with an inert gas G4 is coupled to the seal hoppers 71 and 72.
[0038]
In the regeneration tower 121 configured as described above, the carbonaceous adsorbent A is intermittently supplied into and discharged from the main body by intermittent operation of the seal hoppers 61, 62, 71, 72. Among the seal hoppers 61, 62, 71, 72, those in which the internal carbonaceous adsorbent A flows downward are supplied with inert gases G 3, G 4 by switching the switching valves 66, 67. As a result, the seal hoppers 61, 62, 71, 72 are effectively sealed (gas seal), and the desorbed gas generated in the main body of the regeneration tower 121 leaks from the supply section 6 and the discharge section 7 to the outside of the regeneration tower 121. Is effectively prevented.
[0039]
Here, in the medium regeneration method and the exhaust gas treatment method according to the present invention, the supply amounts of the inert gases G3 and G4 are adjusted so that the relationship represented by the following formula (2) is satisfied. F2 ≧ {118 × V + 13 + (P−10) × 2.2} / 2 (2)
(Wherein F2 represents the flow rate (m ³ / hr) of each of the inert gases G3 and G4, V represents the volume (m ³ ) of each of the seal hoppers 61, 62, 71 and 72, and P represents the regeneration tower. 121 shows the average internal pressure (kPa) of the main body 121.)
[0040]
FIG. 5 shows the inert gas G3 and G4 required for the volume V of the seal hoppers 61, 62, 71 and 72 when the average internal pressure P of the main body of the regeneration tower 121 shown in FIG. It is a graph which shows total flow volume (F2 * 2), and each illustration straight line is corresponded to the lower limit of Formula (2).
[0041]
If the supply amount of the inert gas G3, G4 to the supply unit 6 and the discharge unit 7 is less than the lower limit value shown in the formula (2), the seals of the seal hoppers 61, 62, 71, 72 may not be sufficient. In this case, the desorbed gas tends to leak out of the regeneration tower 121. Further, when the supply amount of the inert gas G3, G4 is made to satisfy the formula (2), a part of the inert gas G3, G4 is regenerated while the sealing performance of the seal hoppers 61, 62, 71, 72 is secured. It flows into the main body of the tower 121.
[0042]
As described above, the inert gases G3 and G4 flowing into the regeneration tower 121 function as a carrier gas similarly to the inert gases G1 and G2 described above. In addition, since the effect by these is the same as that in the regeneration tower 120 shown in FIG. 2, detailed description here is abbreviate | omitted.
[0043]
And since the seal hoppers 61, 62, 71, 72 are sufficiently sealed and a part of the inert gas G1, G2 functions as a carrier gas, it is an excellent leak for the desorbed gas from the carbonaceous adsorbent A. In addition to achieving prevention, the desorbed gas discharge performance is improved and the carbonaceous adsorbent A can be sufficiently regenerated. Further, by optimizing the supply amount of the inert gases G3 and G4, the amount of exhaust gas discharged from the regeneration tower 120 can be reduced, and the efficiency of the entire processing of the exhaust gas W can be improved. Furthermore, since the scale of the desorption gas processing system can be reduced, a carrier gas supply system is not required, so that the cost of equipment or equipment can be reduced.
[0044]
In each of the above-described embodiments, the supply amount of the inert gas supplied to either one of the supply unit 6 and the discharge unit 7 and any one of the supply unit 8 and the discharge unit 9 is expressed by Equation (1) or The flow rate may satisfy (2).
[0045]
【The invention's effect】
As described above, according to the medium regeneration tower, the medium regeneration method, the exhaust gas treatment apparatus, and the exhaust gas treatment method of the present invention, the first gas, the second gas, the second gas supplied to the medium supply unit or the medium discharge unit are provided. Since the gas for 3 or the fourth gas has a flow rate satisfying the relationship represented by the above formula (1) or (2), the excellent sealing performance of the rotary valve or the seal hopper is ensured. A part of these gases functions as a carrier gas. Therefore, sufficient medium regeneration performance can be achieved without using a conventional carrier gas, the amount of exhaust gas from the regeneration tower can be reduced, and the efficiency and economy in exhaust gas treatment can be improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram schematically showing a preferred embodiment of an exhaust gas treatment apparatus according to the present invention.
FIG. 2 is a cross-sectional view schematically showing the structure of the regeneration tower in FIG.
FIG. 3 is a graph showing the total flow rate of inert gas (F1 × 2) required for the inner diameter D of the rotary valve when the average internal pressure P of the main body of the regeneration tower shown in FIG. 2 is changed variously. is there.
FIG. 4 is a schematic cross-sectional view showing the structure of another embodiment of the medium regeneration tower according to the present invention.
5 is a graph showing the total flow rate of inert gas (F2 × 2) required for the volume V of the seal hopper alone when the average internal pressure P of the main body of the regeneration tower shown in FIG. 4 is changed variously. is there.
FIG. 6 is a schematic sectional view showing an example of a regeneration tower using a conventional carrier gas.
[Explanation of symbols]
6, 8 ... supply section (medium supply section), 7, 9 ... discharge section (medium discharge section), 100 ... exhaust gas treatment device, 110 ... reaction tower, 120, 121 ... regeneration tower (medium regeneration tower), 61, 62 , 71, 72 ... seal hopper, 81, 82, 91, 92 ... rotary valve, A ... carbonaceous adsorbent (medium), G1, G2, G3, G4 ... inert gas, W ... exhaust gas.

Claims (6)

A medium regeneration tower that regenerates a medium having adsorption capacity or resolution for a component to be removed contained in exhaust gas and adsorbing or holding the component to be removed or a component derived from the component to be removed,
A medium supply unit having a rotary valve, into which the medium is introduced, and to which the first gas is supplied;
A main body unit disposed downstream of the medium supply unit and in which the medium flows and is regenerated;
A medium discharge unit provided at a subsequent stage of the main body unit, having a rotary valve, for discharging the regenerated medium, and supplying a second gas;
The first or second gas is represented by the following formula (1);
F1 ≧ {0.14 × D + 9.8 + (P−7.9) × 0.53} / 2 (1)
F1: the flow rate of the first gas fork or the second gas (m ³ / hr),
D: Inner diameter (mm) of the rotary valve,
P: average internal pressure (kPa) of the main body,
Are supplied to the medium supply unit and the medium discharge unit, respectively, so as to satisfy the relationship represented by
The medium reproduction tower characterized by the above-mentioned. A regeneration tower having a capacity of adsorbing or resolving a component to be removed contained in exhaust gas and regenerating a medium that adsorbs or holds the component to be removed or a component derived from the component to be removed,
A medium supply unit having a seal hopper, into which the medium is introduced, and to which a third gas is supplied;
A main body unit disposed downstream of the medium supply unit and in which the medium flows and is regenerated;
A medium discharge unit provided at a rear stage of the main body unit, having a seal hopper, in which the regenerated medium is discharged, and a fourth gas is supplied;
The third or fourth gas is the following formula (2);
F2 ≧ {118 × V + 13 + (P−10) × 2.2} / 2 (2)
F2: the flow rate of the third or fourth gas (m ³ / hr),
V: Volume (m ³ ) of the seal hopper alone,
P: average internal pressure (kPa) of the main body,
Are supplied to the medium supply unit and the medium discharge unit, respectively, so as to satisfy the relationship represented by
The medium reproduction tower characterized by the above-mentioned. A medium regeneration method for regenerating a medium having adsorption ability or resolution for a component to be removed contained in exhaust gas and adsorbing or holding the component to be removed or a component derived from the component to be removed,
A medium supply unit having a rotary valve, into which the medium is introduced, and to which the first gas is supplied; a main body unit which is disposed downstream of the medium supply unit and in which the medium flows and is regenerated; A medium regeneration tower having a rotary valve that is provided in a subsequent stage, has a rotary valve, and a medium discharge section to which the regenerated medium is discharged and the second gas is supplied,
Following formula (1);
F1 ≧ { 0.14 × D + 9.8 + (P− 7.9 ) × 0.53 } / 2 (1)
F1: the flow rate of the first gas fork or the second gas (m ³ / hr),
D: Inner diameter (mm) of the rotary valve,
P: average internal pressure (kPa) of the main body,
The first and second gases are supplied to the medium supply unit and the medium discharge unit, respectively, so as to satisfy the relationship represented by:
A medium reproducing method characterized by the above. A medium regeneration method for regenerating a medium having adsorption ability or resolution for a component to be removed contained in exhaust gas and adsorbing or holding the component to be removed or a component derived from the component to be removed,
A medium hopper having a seal hopper, into which the medium is introduced and to which a third gas is supplied, and a main body which is arranged downstream of the medium supply section and in which the medium flows and is regenerated. A medium regeneration tower provided at the rear stage of the main body part, having a seal hopper, the medium being regenerated is discharged, and a medium discharge part to which a fourth gas is supplied is used,
Following formula (2);
F2 ≧ { 118 × V + 13 + (P− 10 ) × 2.2 } / 2 (2)
F2: the flow rate of the third or fourth gas (m ³ / hr),
V: Volume (m ³ ) of the seal hopper alone ,
P: average internal pressure (kPa) of the main body,
The third and fourth gases are supplied to the medium supply unit and the medium discharge unit, respectively, so as to satisfy the relationship represented by:
A medium reproducing method characterized by the above. An exhaust gas treatment apparatus for removing a component to be removed contained in exhaust gas,
A reaction tower through which the exhaust gas is circulated and supplied with a medium having adsorption capacity or resolution for the component to be removed;
The medium regeneration tower according to claim 1 or 2, wherein the medium that adsorbs or holds the component to be removed or the component derived from the component to be removed is supplied in the reaction tower;
An exhaust gas treatment apparatus comprising: An exhaust gas treatment method for removing components to be removed contained in exhaust gas,
Contacting the exhaust gas with a medium having an adsorptive capacity or resolution for the component to be removed;
The medium that adsorbs or holds the component to be removed or the component derived from the component to be removed is reproduced by the medium reproduction method according to claim 3 or 4.
An exhaust gas treatment method characterized by that.

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